The doapr_outch function in crypto/bio/b_print.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g does not verify that a certain memory allocation succeeds, which allows remote attackers to cause a denial of service (out-of-bounds write or memory consumption) or possibly have unspecified other impact via a long string, as demonstrated by a large amount of ASN.1 data, a different vulnerability than CVE-2016-0799.

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2016-3556 advisory.

  - The fmtstr function in crypto/bio/b_print.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g     improperly calculates string lengths, which allows remote attackers to cause a denial of service (overflow     and out-of-bounds read) or possibly have unspecified other impact via a long string, as demonstrated by a     large amount of ASN.1 data, a different vulnerability than CVE-2016-2842. (CVE-2016-0799)

  - Integer overflow in the EVP_EncodeUpdate function in crypto/evp/encode.c in OpenSSL before 1.0.1t and     1.0.2 before 1.0.2h allows remote attackers to cause a denial of service (heap memory corruption) via a     large amount of binary data. (CVE-2016-2105)

  - The AES-NI implementation in OpenSSL before 1.0.1t and 1.0.2 before 1.0.2h does not consider memory     allocation during a certain padding check, which allows remote attackers to obtain sensitive cleartext     information via a padding-oracle attack against an AES CBC session. NOTE: this vulnerability exists     because of an incorrect fix for CVE-2013-0169. (CVE-2016-2107)

  - The doapr_outch function in crypto/bio/b_print.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g     does not verify that a certain memory allocation succeeds, which allows remote attackers to cause a denial     of service (out-of-bounds write or memory consumption) or possibly have unspecified other impact via a     long string, as demonstrated by a large amount of ASN.1 data, a different vulnerability than     CVE-2016-0799. (CVE-2016-2842)

  - Integer overflow in the EVP_EncryptUpdate function in crypto/evp/evp_enc.c in OpenSSL before 1.0.1t and     1.0.2 before 1.0.2h allows remote attackers to cause a denial of service (heap memory corruption) via a     large amount of data. (CVE-2016-2106)

  - The ASN.1 implementation in OpenSSL before 1.0.1o and 1.0.2 before 1.0.2c allows remote attackers to     execute arbitrary code or cause a denial of service (buffer underflow and memory corruption) via an ANY     field in crafted serialized data, aka the negative zero issue. (CVE-2016-2108)

  - The asn1_d2i_read_bio function in crypto/asn1/a_d2i_fp.c in the ASN.1 BIO implementation in OpenSSL before     1.0.1t and 1.0.2 before 1.0.2h allows remote attackers to cause a denial of service (memory consumption)     via a short invalid encoding. (CVE-2016-2109)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2016-3558 advisory.

  - The fmtstr function in crypto/bio/b_print.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g     improperly calculates string lengths, which allows remote attackers to cause a denial of service (overflow     and out-of-bounds read) or possibly have unspecified other impact via a long string, as demonstrated by a     large amount of ASN.1 data, a different vulnerability than CVE-2016-2842. (CVE-2016-0799)

  - Integer overflow in the EVP_EncodeUpdate function in crypto/evp/encode.c in OpenSSL before 1.0.1t and     1.0.2 before 1.0.2h allows remote attackers to cause a denial of service (heap memory corruption) via a     large amount of binary data. (CVE-2016-2105)

  - The AES-NI implementation in OpenSSL before 1.0.1t and 1.0.2 before 1.0.2h does not consider memory     allocation during a certain padding check, which allows remote attackers to obtain sensitive cleartext     information via a padding-oracle attack against an AES CBC session. NOTE: this vulnerability exists     because of an incorrect fix for CVE-2013-0169. (CVE-2016-2107)

  - The doapr_outch function in crypto/bio/b_print.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g     does not verify that a certain memory allocation succeeds, which allows remote attackers to cause a denial     of service (out-of-bounds write or memory consumption) or possibly have unspecified other impact via a     long string, as demonstrated by a large amount of ASN.1 data, a different vulnerability than     CVE-2016-0799. (CVE-2016-2842)

  - Integer overflow in the EVP_EncryptUpdate function in crypto/evp/evp_enc.c in OpenSSL before 1.0.1t and     1.0.2 before 1.0.2h allows remote attackers to cause a denial of service (heap memory corruption) via a     large amount of data. (CVE-2016-2106)

  - The ASN.1 implementation in OpenSSL before 1.0.1o and 1.0.2 before 1.0.2c allows remote attackers to     execute arbitrary code or cause a denial of service (buffer underflow and memory corruption) via an ANY     field in crafted serialized data, aka the negative zero issue. (CVE-2016-2108)

  - The asn1_d2i_read_bio function in crypto/asn1/a_d2i_fp.c in the ASN.1 BIO implementation in OpenSSL before     1.0.1t and 1.0.2 before 1.0.2h allows remote attackers to cause a denial of service (memory consumption)     via a short invalid encoding. (CVE-2016-2109)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2016-3571 advisory.

  - The fmtstr function in crypto/bio/b_print.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g     improperly calculates string lengths, which allows remote attackers to cause a denial of service (overflow     and out-of-bounds read) or possibly have unspecified other impact via a long string, as demonstrated by a     large amount of ASN.1 data, a different vulnerability than CVE-2016-2842. (CVE-2016-0799)

  - Integer overflow in the EVP_EncodeUpdate function in crypto/evp/encode.c in OpenSSL before 1.0.1t and     1.0.2 before 1.0.2h allows remote attackers to cause a denial of service (heap memory corruption) via a     large amount of binary data. (CVE-2016-2105)

  - The AES-NI implementation in OpenSSL before 1.0.1t and 1.0.2 before 1.0.2h does not consider memory     allocation during a certain padding check, which allows remote attackers to obtain sensitive cleartext     information via a padding-oracle attack against an AES CBC session. NOTE: this vulnerability exists     because of an incorrect fix for CVE-2013-0169. (CVE-2016-2107)

  - The doapr_outch function in crypto/bio/b_print.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g     does not verify that a certain memory allocation succeeds, which allows remote attackers to cause a denial     of service (out-of-bounds write or memory consumption) or possibly have unspecified other impact via a     long string, as demonstrated by a large amount of ASN.1 data, a different vulnerability than     CVE-2016-0799. (CVE-2016-2842)

  - Integer overflow in the EVP_EncryptUpdate function in crypto/evp/evp_enc.c in OpenSSL before 1.0.1t and     1.0.2 before 1.0.2h allows remote attackers to cause a denial of service (heap memory corruption) via a     large amount of data. (CVE-2016-2106)

  - The ASN.1 implementation in OpenSSL before 1.0.1o and 1.0.2 before 1.0.2c allows remote attackers to     execute arbitrary code or cause a denial of service (buffer underflow and memory corruption) via an ANY     field in crafted serialized data, aka the negative zero issue. (CVE-2016-2108)

  - The asn1_d2i_read_bio function in crypto/asn1/a_d2i_fp.c in the ASN.1 BIO implementation in OpenSSL before     1.0.1t and 1.0.2 before 1.0.2h allows remote attackers to cause a denial of service (memory consumption)     via a short invalid encoding. (CVE-2016-2109)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to the versions of the openssl098e package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - An integer overflow flaw, leading to a buffer overflow,     was found in the way the EVP_EncodeUpdate() function of     OpenSSL parsed very large amounts of input data. A     remote attacker could use this flaw to crash an     application using OpenSSL or, possibly, execute     arbitrary code with the permissions of the user running     that application.(CVE-2016-2105)

  - An integer overflow flaw, leading to a buffer overflow,     was found in the way the EVP_EncryptUpdate() function     of OpenSSL parsed very large amounts of input data. A     remote attacker could use this flaw to crash an     application using OpenSSL or, possibly, execute     arbitrary code with the permissions of the user running     that application.(CVE-2016-2106)

  - A denial of service flaw was found in the way OpenSSL     parsed certain ASN.1-encoded data from BIO (OpenSSL's     I/O abstraction) inputs. An application using OpenSSL     that accepts untrusted ASN.1 BIO input could be forced     to allocate an excessive amount of data.(CVE-2016-2109)

  - The fmtstr function in crypto/bio/b_print.c in OpenSSL     1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g improperly     calculates string lengths, which allows remote     attackers to cause a denial of service (overflow and     out-of-bounds read) or possibly have unspecified other     impact via a long string, as demonstrated by a large     amount of ASN.1 data, a different vulnerability than     CVE-2016-2842.(CVE-2016-0799)

  - The certificate parser in OpenSSL before 1.0.1u and     1.0.2 before 1.0.2i might allow remote attackers to     cause a denial of service (out-of-bounds read) via     crafted certificate operations, related to s3_clnt.c     and s3_srvr.c.(CVE-2016-6306)

  - The doapr_outch function in crypto/bio/b_print.c in     OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g     does not verify that a certain memory allocation     succeeds, which allows remote attackers to cause a     denial of service (out-of-bounds write or memory     consumption) or possibly have unspecified other impact     via a long string, as demonstrated by a large amount of     ASN.1 data, a different vulnerability than     CVE-2016-0799.(CVE-2016-2842)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

An update for openssl is now available for Red Hat Enterprise Linux 6.7 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.

Security Fix(es) :

* A flaw was found in the way OpenSSL encoded certain ASN.1 data structures. An attacker could use this flaw to create a specially crafted certificate which, when verified or re-encoded by OpenSSL, could cause it to crash, or execute arbitrary code using the permissions of the user running an application compiled against the OpenSSL library. (CVE-2016-2108)

* Two integer overflow flaws, leading to buffer overflows, were found in the way the EVP_EncodeUpdate() and EVP_EncryptUpdate() functions of OpenSSL parsed very large amounts of input data. A remote attacker could use these flaws to crash an application using OpenSSL or, possibly, execute arbitrary code with the permissions of the user running that application. (CVE-2016-2105, CVE-2016-2106)

* It was discovered that OpenSSL leaked timing information when decrypting TLS/SSL and DTLS protocol encrypted records when the connection used the AES CBC cipher suite and the server supported AES-NI. A remote attacker could possibly use this flaw to retrieve plain text from encrypted packets by using a TLS/SSL or DTLS server as a padding oracle. (CVE-2016-2107)

* Several flaws were found in the way BIO_*printf functions were implemented in OpenSSL. Applications which passed large amounts of untrusted data through these functions could crash or potentially execute code with the permissions of the user running such an application. (CVE-2016-0799, CVE-2016-2842)

* A denial of service flaw was found in the way OpenSSL parsed certain ASN.1-encoded data from BIO (OpenSSL's I/O abstraction) inputs. An application using OpenSSL that accepts untrusted ASN.1 BIO input could be forced to allocate an excessive amount of data. (CVE-2016-2109)

Red Hat would like to thank the OpenSSL project for reporting CVE-2016-2108, CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, CVE-2016-2107, and CVE-2016-0799. Upstream acknowledges Huzaifa Sidhpurwala (Red Hat), Hanno Bock, and David Benjamin (Google) as the original reporters of CVE-2016-2108; Guido Vranken as the original reporter of CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, and CVE-2016-0799; and Juraj Somorovsky as the original reporter of CVE-2016-2107.

The doapr_outch function in crypto/bio/b_print.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g does not verify that a certain memory allocation succeeds, which allows remote attackers to cause a denial of service (out-of-bounds write or memory consumption) or possibly have unspecified other impact via a long string, as demonstrated by a large amount of ASN.1 data, a different vulnerability than CVE-2016-0799. (CVE-2016-2842)

According to its banner, the version of OpenSSL on the remote host is 1.0.2 prior to 1.0.2g or 1.0.1 prior to 1.0.1s and is affected by a flaw in the 'doapr_outch()' function within 'crypto/bio/b_print.c' that is triggered when failing to allocate memory, as the function's return value has no way to signal this error to a calling function. This may allow a context-dependent attacker to corrupt memory and crash a process linked against the library or potentially execute arbitrary code.

The fmtstr function in crypto/bio/b_print.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g improperly calculates string lengths, which allows remote attackers to cause a denial of service (overflow and out-of-bounds read) or possibly have unspecified other impact via a long string, as demonstrated by a large amount of ASN.1 data, a different vulnerability than CVE-2016-2842. (CVE-2016-0799)

Security Fix(es) :

  - A flaw was found in the way OpenSSL encoded certain     ASN.1 data structures. An attacker could use this flaw     to create a specially crafted certificate which, when     verified or re-encoded by OpenSSL, could cause it to     crash, or execute arbitrary code using the permissions     of the user running an application compiled against the     OpenSSL library. (CVE-2016-2108)

  - Two integer overflow flaws, leading to buffer overflows,     were found in the way the EVP_EncodeUpdate() and     EVP_EncryptUpdate() functions of OpenSSL parsed very     large amounts of input data. A remote attacker could use     these flaws to crash an application using OpenSSL or,     possibly, execute arbitrary code with the permissions of     the user running that application. (CVE-2016-2105,     CVE-2016-2106)

  - It was discovered that OpenSSL leaked timing information     when decrypting TLS/SSL and DTLS protocol encrypted     records when the connection used the AES CBC cipher     suite and the server supported AES-NI. A remote attacker     could possibly use this flaw to retrieve plain text from     encrypted packets by using a TLS/SSL or DTLS server as a     padding oracle. (CVE-2016-2107)

  - Several flaws were found in the way BIO_*printf     functions were implemented in OpenSSL. Applications     which passed large amounts of untrusted data through     these functions could crash or potentially execute code     with the permissions of the user running such an     application. (CVE-2016-0799, CVE-2016-2842)

  - A denial of service flaw was found in the way OpenSSL     parsed certain ASN.1-encoded data from BIO (OpenSSL's     I/O abstraction) inputs. An application using OpenSSL     that accepts untrusted ASN.1 BIO input could be forced     to allocate an excessive amount of data. (CVE-2016-2109)

According to its banner, the version of HP System Management Homepage (SMH) hosted on the remote web server is affected by the following vulnerabilities :

  - A denial of service vulnerability exists in the Apache     HTTP Server due to the lack of the mod_reqtimeout     module. An unauthenticated, remote attacker can exploit     this, via a saturation of partial HTTP requests, to     cause a daemon outage. (CVE-2007-6750)

  - A cross-site scripting (XSS) vulnerability exists in     jQuery when using location.hash to select elements. An     unauthenticated, remote attacker can exploit this, via     a specially crafted tag, to inject arbitrary script     code or HTML into the user's browser session.
    (CVE-2011-4969)

  - A NULL pointer dereference flaw exists in file     rsa_ameth.c due to improper handling of ASN.1 signatures     that are missing the PSS parameter. A remote attacker     can exploit this to cause the signature verification     routine to crash, resulting in a denial of service     condition. (CVE-2015-3194)

  - A flaw exists in the ASN1_TFLG_COMBINE implementation in     file tasn_dec.c related to handling malformed     X509_ATTRIBUTE structures. A remote attacker can exploit     this to cause a memory leak by triggering a decoding     failure in a PKCS#7 or CMS application, resulting in a     denial of service. (CVE-2015-3195)

  - An out-of-bounds read error exists in cURL and libcurl     within the smb_request_state() function due to improper     bounds checking. An unauthenticated, remote attacker     can exploit this, using a malicious SMB server and     crafted length and offset values, to disclose sensitive     memory information or to cause a denial of service     condition. (CVE-2015-3237)

  - A flaw exists in libxslt in the xsltStylePreCompute()     function within file preproc.c due to a failure to check     if the parent node is an element. An unauthenticated,     remote attacker can exploit this, via a specially     crafted XML file, to cause a denial of service     condition. (CVE-2015-7995)

  - An infinite loop condition exists in the xz_decomp()     function within file xzlib.c when handling xz compressed     XML content due to a failure to detect compression     errors. An unauthenticated, remote attacker can exploit     this, via specially crafted XML data, to cause a denial     of service condition. (CVE-2015-8035)

  - A double-free error exists due to improper validation of     user-supplied input when parsing malformed DSA private     keys. A remote attacker can exploit this to corrupt     memory, resulting in a denial of service condition or     the execution of arbitrary code. (CVE-2016-0705)

  - An out-of-bounds read error exists in the fmtstr()     function within file crypto/bio/b_print.c when printing     very long strings due to a failure to properly calculate     string lengths. An unauthenticated, remote attacker can     exploit this, via a long string, to cause a denial of     service condition, as demonstrated by a large amount of     ASN.1 data. (CVE-2016-0799)

  - An unspecified flaw exists that allows a local attacker     to impact the confidentiality and integrity of the     system. No other details are available. (CVE-2016-2015)

  - A flaw exists in the doapr_outch() function within file     crypto/bio/b_print.c due to a failure to verify that a     certain memory allocation succeeds. An unauthenticated,     remote attacker can exploit this, via a long string,     to cause a denial of service condition, as demonstrated     by a large amount of ASN.1 data. (CVE-2016-2842)

An update for openssl is now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.

Security Fix(es) :

* A flaw was found in the way OpenSSL encoded certain ASN.1 data structures. An attacker could use this flaw to create a specially crafted certificate which, when verified or re-encoded by OpenSSL, could cause it to crash, or execute arbitrary code using the permissions of the user running an application compiled against the OpenSSL library. (CVE-2016-2108)

* Two integer overflow flaws, leading to buffer overflows, were found in the way the EVP_EncodeUpdate() and EVP_EncryptUpdate() functions of OpenSSL parsed very large amounts of input data. A remote attacker could use these flaws to crash an application using OpenSSL or, possibly, execute arbitrary code with the permissions of the user running that application. (CVE-2016-2105, CVE-2016-2106)

* It was discovered that OpenSSL leaked timing information when decrypting TLS/SSL and DTLS protocol encrypted records when the connection used the AES CBC cipher suite and the server supported AES-NI. A remote attacker could possibly use this flaw to retrieve plain text from encrypted packets by using a TLS/SSL or DTLS server as a padding oracle. (CVE-2016-2107)

* Several flaws were found in the way BIO_*printf functions were implemented in OpenSSL. Applications which passed large amounts of untrusted data through these functions could crash or potentially execute code with the permissions of the user running such an application. (CVE-2016-0799, CVE-2016-2842)

* A denial of service flaw was found in the way OpenSSL parsed certain ASN.1-encoded data from BIO (OpenSSL's I/O abstraction) inputs. An application using OpenSSL that accepts untrusted ASN.1 BIO input could be forced to allocate an excessive amount of data. (CVE-2016-2109)

Red Hat would like to thank the OpenSSL project for reporting CVE-2016-2108, CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, CVE-2016-2107, and CVE-2016-0799. Upstream acknowledges Huzaifa Sidhpurwala (Red Hat), Hanno Böck, and David Benjamin (Google) as the original reporters of CVE-2016-2108; Guido Vranken as the original reporter of CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, and CVE-2016-0799; and Juraj Somorovsky as the original reporter of CVE-2016-2107.

From Red Hat Security Advisory 2016:0996 :

An update for openssl is now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.

Security Fix(es) :

* A flaw was found in the way OpenSSL encoded certain ASN.1 data structures. An attacker could use this flaw to create a specially crafted certificate which, when verified or re-encoded by OpenSSL, could cause it to crash, or execute arbitrary code using the permissions of the user running an application compiled against the OpenSSL library. (CVE-2016-2108)

* Two integer overflow flaws, leading to buffer overflows, were found in the way the EVP_EncodeUpdate() and EVP_EncryptUpdate() functions of OpenSSL parsed very large amounts of input data. A remote attacker could use these flaws to crash an application using OpenSSL or, possibly, execute arbitrary code with the permissions of the user running that application. (CVE-2016-2105, CVE-2016-2106)

* It was discovered that OpenSSL leaked timing information when decrypting TLS/SSL and DTLS protocol encrypted records when the connection used the AES CBC cipher suite and the server supported AES-NI. A remote attacker could possibly use this flaw to retrieve plain text from encrypted packets by using a TLS/SSL or DTLS server as a padding oracle. (CVE-2016-2107)

* Several flaws were found in the way BIO_*printf functions were implemented in OpenSSL. Applications which passed large amounts of untrusted data through these functions could crash or potentially execute code with the permissions of the user running such an application. (CVE-2016-0799, CVE-2016-2842)

* A denial of service flaw was found in the way OpenSSL parsed certain ASN.1-encoded data from BIO (OpenSSL's I/O abstraction) inputs. An application using OpenSSL that accepts untrusted ASN.1 BIO input could be forced to allocate an excessive amount of data. (CVE-2016-2109)

Red Hat would like to thank the OpenSSL project for reporting CVE-2016-2108, CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, CVE-2016-2107, and CVE-2016-0799. Upstream acknowledges Huzaifa Sidhpurwala (Red Hat), Hanno Bock, and David Benjamin (Google) as the original reporters of CVE-2016-2108; Guido Vranken as the original reporter of CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, and CVE-2016-0799; and Juraj Somorovsky as the original reporter of CVE-2016-2107.

An update for openssl is now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.

Security Fix(es) :

* A flaw was found in the way OpenSSL encoded certain ASN.1 data structures. An attacker could use this flaw to create a specially crafted certificate which, when verified or re-encoded by OpenSSL, could cause it to crash, or execute arbitrary code using the permissions of the user running an application compiled against the OpenSSL library. (CVE-2016-2108)

* Two integer overflow flaws, leading to buffer overflows, were found in the way the EVP_EncodeUpdate() and EVP_EncryptUpdate() functions of OpenSSL parsed very large amounts of input data. A remote attacker could use these flaws to crash an application using OpenSSL or, possibly, execute arbitrary code with the permissions of the user running that application. (CVE-2016-2105, CVE-2016-2106)

* It was discovered that OpenSSL leaked timing information when decrypting TLS/SSL and DTLS protocol encrypted records when the connection used the AES CBC cipher suite and the server supported AES-NI. A remote attacker could possibly use this flaw to retrieve plain text from encrypted packets by using a TLS/SSL or DTLS server as a padding oracle. (CVE-2016-2107)

* Several flaws were found in the way BIO_*printf functions were implemented in OpenSSL. Applications which passed large amounts of untrusted data through these functions could crash or potentially execute code with the permissions of the user running such an application. (CVE-2016-0799, CVE-2016-2842)

* A denial of service flaw was found in the way OpenSSL parsed certain ASN.1-encoded data from BIO (OpenSSL's I/O abstraction) inputs. An application using OpenSSL that accepts untrusted ASN.1 BIO input could be forced to allocate an excessive amount of data. (CVE-2016-2109)

Red Hat would like to thank the OpenSSL project for reporting CVE-2016-2108, CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, CVE-2016-2107, and CVE-2016-0799. Upstream acknowledges Huzaifa Sidhpurwala (Red Hat), Hanno Bock, and David Benjamin (Google) as the original reporters of CVE-2016-2108; Guido Vranken as the original reporter of CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, and CVE-2016-0799; and Juraj Somorovsky as the original reporter of CVE-2016-2107.

An update for openssl is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.

Security Fix(es) :

* A flaw was found in the way OpenSSL encoded certain ASN.1 data structures. An attacker could use this flaw to create a specially crafted certificate which, when verified or re-encoded by OpenSSL, could cause it to crash, or execute arbitrary code using the permissions of the user running an application compiled against the OpenSSL library. (CVE-2016-2108)

* Two integer overflow flaws, leading to buffer overflows, were found in the way the EVP_EncodeUpdate() and EVP_EncryptUpdate() functions of OpenSSL parsed very large amounts of input data. A remote attacker could use these flaws to crash an application using OpenSSL or, possibly, execute arbitrary code with the permissions of the user running that application. (CVE-2016-2105, CVE-2016-2106)

* It was discovered that OpenSSL leaked timing information when decrypting TLS/SSL and DTLS protocol encrypted records when the connection used the AES CBC cipher suite and the server supported AES-NI. A remote attacker could possibly use this flaw to retrieve plain text from encrypted packets by using a TLS/SSL or DTLS server as a padding oracle. (CVE-2016-2107)

* Several flaws were found in the way BIO_*printf functions were implemented in OpenSSL. Applications which passed large amounts of untrusted data through these functions could crash or potentially execute code with the permissions of the user running such an application. (CVE-2016-0799, CVE-2016-2842)

* A denial of service flaw was found in the way OpenSSL parsed certain ASN.1-encoded data from BIO (OpenSSL's I/O abstraction) inputs. An application using OpenSSL that accepts untrusted ASN.1 BIO input could be forced to allocate an excessive amount of data. (CVE-2016-2109)

Red Hat would like to thank the OpenSSL project for reporting CVE-2016-2108, CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, CVE-2016-2107, and CVE-2016-0799. Upstream acknowledges Huzaifa Sidhpurwala (Red Hat), Hanno Bock, and David Benjamin (Google) as the original reporters of CVE-2016-2108; Guido Vranken as the original reporter of CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, and CVE-2016-0799; and Juraj Somorovsky as the original reporter of CVE-2016-2107.

From Red Hat Security Advisory 2016:0722 :

An update for openssl is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.

Security Fix(es) :

* A flaw was found in the way OpenSSL encoded certain ASN.1 data structures. An attacker could use this flaw to create a specially crafted certificate which, when verified or re-encoded by OpenSSL, could cause it to crash, or execute arbitrary code using the permissions of the user running an application compiled against the OpenSSL library. (CVE-2016-2108)

* Two integer overflow flaws, leading to buffer overflows, were found in the way the EVP_EncodeUpdate() and EVP_EncryptUpdate() functions of OpenSSL parsed very large amounts of input data. A remote attacker could use these flaws to crash an application using OpenSSL or, possibly, execute arbitrary code with the permissions of the user running that application. (CVE-2016-2105, CVE-2016-2106)

* It was discovered that OpenSSL leaked timing information when decrypting TLS/SSL and DTLS protocol encrypted records when the connection used the AES CBC cipher suite and the server supported AES-NI. A remote attacker could possibly use this flaw to retrieve plain text from encrypted packets by using a TLS/SSL or DTLS server as a padding oracle. (CVE-2016-2107)

* Several flaws were found in the way BIO_*printf functions were implemented in OpenSSL. Applications which passed large amounts of untrusted data through these functions could crash or potentially execute code with the permissions of the user running such an application. (CVE-2016-0799, CVE-2016-2842)

* A denial of service flaw was found in the way OpenSSL parsed certain ASN.1-encoded data from BIO (OpenSSL's I/O abstraction) inputs. An application using OpenSSL that accepts untrusted ASN.1 BIO input could be forced to allocate an excessive amount of data. (CVE-2016-2109)

Red Hat would like to thank the OpenSSL project for reporting CVE-2016-2108, CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, CVE-2016-2107, and CVE-2016-0799. Upstream acknowledges Huzaifa Sidhpurwala (Red Hat), Hanno Bock, and David Benjamin (Google) as the original reporters of CVE-2016-2108; Guido Vranken as the original reporter of CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, and CVE-2016-0799; and Juraj Somorovsky as the original reporter of CVE-2016-2107.

The version of OpenSSL installed on the remote AIX host is affected by the following vulnerabilities :

  - A key disclosure vulnerability exists due to improper     handling of cache-bank conflicts on the Intel     Sandy-bridge microarchitecture. An attacker can exploit     this to gain access to RSA key information.
    (CVE-2016-0702)

  - A double-free error exists due to improper validation of     user-supplied input when parsing malformed DSA private     keys. A remote attacker can exploit this to corrupt     memory, resulting in a denial of service condition or     the execution of arbitrary code. (CVE-2016-0705)

  - A NULL pointer dereference flaw exists in the     BN_hex2bn() and BN_dec2bn() functions. A remote attacker     can exploit this to trigger a heap corruption, resulting     in the execution of arbitrary code. (CVE-2016-0797)

  - A denial of service vulnerability exists due to improper     handling of invalid usernames. A remote attacker can     exploit this, via a specially crafted username, to leak     300 bytes of memory per connection, exhausting available     memory resources. (CVE-2016-0798)

  - Multiple memory corruption issues exist that allow a     remote attacker to cause a denial of service condition     or the execution of arbitrary code. (CVE-2016-0799)

  - A flaw exists that allows a cross-protocol     Bleichenbacher padding oracle attack known as DROWN     (Decrypting RSA with Obsolete and Weakened eNcryption).
    This vulnerability exists due to a flaw in the Secure     Sockets Layer Version 2 (SSLv2) implementation, and it     allows captured TLS traffic to be decrypted. A     man-in-the-middle attacker can exploit this to decrypt     the TLS connection by utilizing previously captured     traffic and weak cryptography along with a series of     specially crafted connections to an SSLv2 server that     uses the same private key. (CVE-2016-0800)

  - A denial of service vulnerability exists due to improper     verification of memory allocation by the doapr_outch()     function in file crypto/bio/b_print.c. A remote attacker     can exploit this, via a specially crafted string, to     write data out-of-bounds or exhaust memory resources or     possibly have other unspecified impact. (CVE-2016-2842)

A padding oracle flaw was found in the Secure Sockets Layer version 2.0 (SSLv2) protocol. An attacker can potentially use this flaw to decrypt RSA-encrypted cipher text from a connection using a newer SSL/TLS protocol version, allowing them to decrypt such connections.
This cross-protocol attack is publicly referred to as DROWN (CVE-2016-0800). Prior to this advisory, SSLv2 has been disabled by default in OpenSSL on the Amazon Linux AMI. However, application configurations may still re-enable SSLv2.

A flaw was found in the way TLS 1.2 could use the MD5 hash function for signing ServerKeyExchange and Client Authentication packets during a TLS handshake. A man-in-the-middle attacker able to force a TLS connection to use the MD5 hash function could use this flaw to conduct collision attacks to impersonate a TLS server or an authenticated TLS client. (CVE-2015-7575 , Medium)

A flaw was found in the way malicious SSLv2 clients could negotiate SSLv2 ciphers that have been disabled on the server. This could result in weak SSLv2 ciphers being used for SSLv2 connections, making them vulnerable to man-in-the-middle attacks. (CVE-2015-3197 , Low)

A side-channel attack was found that makes use of cache-bank conflicts on the Intel Sandy-Bridge microarchitecture. An attacker who has the ability to control code in a thread running on the same hyper-threaded core as the victim's thread that is performing decryption, could use this flaw to recover RSA private keys. (CVE-2016-0702 , Low)

A double-free flaw was found in the way OpenSSL parsed certain malformed DSA (Digital Signature Algorithm) private keys. An attacker could create specially crafted DSA private keys that, when processed by an application compiled against OpenSSL, could cause the application to crash. (CVE-2016-0705 , Low)

An integer overflow flaw, leading to a NULL pointer dereference or a heap-based memory corruption, was found in the way some BIGNUM functions of OpenSSL were implemented. Applications that use these functions with large untrusted input could crash or, potentially, execute arbitrary code. (CVE-2016-0797 , Low)

The fmtstr function in crypto/bio/b_print.c in OpenSSL improperly calculated string lengths, which allows remote attackers to cause a denial of service (overflow and out-of-bounds read) or possibly have unspecified other impact via a long string, as demonstrated by a large amount of ASN.1 data. (CVE-2016-0799 , Low)

The doapr_outch function in crypto/bio/b_print.c in OpenSSL did not verify that a certain memory allocation succeeds, which allows remote attackers to cause a denial of service (out-of-bounds write or memory consumption) or possibly have unspecified other impact via a long string, as demonstrated by a large amount of ASN.1 data.
(CVE-2016-2842 , Low)

'(Updated on 2016-04-28: CVE-2016-2842 was fixed as part of this update but was previously not listed in this advisory.)'

Several vulnerabilities were discovered in OpenSSL, a Secure Socket Layer toolkit.

  - CVE-2016-0702     Yuval Yarom from the University of Adelaide and NICTA,     Daniel Genkin from Technion and Tel Aviv University, and     Nadia Heninger from the University of Pennsylvania     discovered a side-channel attack which makes use of     cache-bank conflicts on the Intel Sandy-Bridge     microarchitecture. This could allow local attackers to     recover RSA private keys.

  - CVE-2016-0705     Adam Langley from Google discovered a double free bug     when parsing malformed DSA private keys. This could     allow remote attackers to cause a denial of service or     memory corruption in applications parsing DSA private     keys received from untrusted sources.

  - CVE-2016-0797     Guido Vranken discovered an integer overflow in the     BN_hex2bn and BN_dec2bn functions that can lead to a     NULL pointer dereference and heap corruption. This could     allow remote attackers to cause a denial of service or     memory corruption in applications processing hex or dec     data received from untrusted sources.

  - CVE-2016-0798     Emilia Kasper of the OpenSSL development team     discovered a memory leak in the SRP database lookup     code. To mitigate the memory leak, the seed handling in     SRP_VBASE_get_by_user is now disabled even if the user     has configured a seed. Applications are advised to     migrate to the SRP_VBASE_get1_by_user function.

  - CVE-2016-0799, CVE-2016-2842     Guido Vranken discovered an integer overflow in the     BIO_*printf functions that could lead to an OOB read     when printing very long strings. Additionally the     internal doapr_outch function can attempt to write to an     arbitrary memory location in the event of a memory     allocation failure. These issues will only occur on     platforms where sizeof(size_t) > sizeof(int) like many     64 bit systems. This could allow remote attackers to     cause a denial of service or memory corruption in     applications that pass large amounts of untrusted data     to the BIO_*printf functions.

Additionally the EXPORT and LOW ciphers were disabled since thay could be used as part of the DROWN (CVE-2016-0800 ) and SLOTH (CVE-2015-7575 ) attacks, but note that the oldstable (wheezy) and stable (jessie) distributions are not affected by those attacks since the SSLv2 protocol has already been dropped in the openssl package version 1.0.0c-2.

ID	Name	Product	Family	Severity
181111	Oracle Linux 7 : openssl (ELSA-2016-3556)	Nessus	Oracle Linux Local Security Checks	critical
181033	Oracle Linux 6 : openssl (ELSA-2016-3558)	Nessus	Oracle Linux Local Security Checks	critical
181030	Oracle Linux 6 : openssl-fips (ELSA-2016-3571)	Nessus	Oracle Linux Local Security Checks	critical
130679	EulerOS 2.0 SP5 : openssl098e (EulerOS-SA-2019-2217)	Nessus	Huawei Local Security Checks	critical
94105	RHEL 6 : openssl (RHSA-2016:2073)	Nessus	Red Hat Local Security Checks	critical
93201	F5 Networks BIG-IP : OpenSSL vulnerability (K52349521)	Nessus	F5 Networks Local Security Checks	critical
9466	OpenSSL 1.0.1 < 1.0.1s / 1.0.2 < 1.0.2g RCE	Nessus Network Monitor	Web Servers	critical
92707	F5 Networks BIG-IP : OpenSSL vulnerability (K22334603)	Nessus	F5 Networks Local Security Checks	critical
91541	Scientific Linux Security Update : openssl on SL6.x i386/x86_64 (20160510)	Nessus	Scientific Linux Local Security Checks	critical
91222	HP System Management Homepage Multiple Vulnerabilities (HPSBMU03593)	Nessus	Web Servers	critical
91171	CentOS 6 : openssl (CESA-2016:0996)	Nessus	CentOS Local Security Checks	critical
91152	Oracle Linux 6 : openssl (ELSA-2016-0996)	Nessus	Oracle Linux Local Security Checks	critical
91041	Scientific Linux Security Update : openssl on SL7.x x86_64 (20160509)	Nessus	Scientific Linux Local Security Checks	critical
91037	RHEL 6 : openssl (RHSA-2016:0996)	Nessus	Red Hat Local Security Checks	critical
91033	RHEL 7 : openssl (RHSA-2016:0722)	Nessus	Red Hat Local Security Checks	critical
91029	Oracle Linux 7 : openssl (ELSA-2016-0722)	Nessus	Oracle Linux Local Security Checks	critical
91017	CentOS 7 : openssl (CESA-2016:0722)	Nessus	CentOS Local Security Checks	critical
90448	AIX OpenSSL Advisory : openssl_advisory18.asc / openssl_advisory19.asc (DROWN)	Nessus	AIX Local Security Checks	critical
89842	Amazon Linux AMI : openssl (ALAS-2016-661) (DROWN) (SLOTH)	Nessus	Amazon Linux Local Security Checks	critical
89061	Debian DSA-3500-1 : openssl - security update	Nessus	Debian Local Security Checks	critical

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CVE-2016-2842

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