OpenSSL 0.9.8f and 0.9.8g allows remote attackers to cause a denial of service (crash) via a TLS handshake that omits the Server Key Exchange message and uses "particular cipher suites," which triggers a NULL pointer dereference.

The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has openssl packages installed that are affected by multiple vulnerabilities:

  - OpenSSL 1.0.2 (starting from version 1.0.2b) introduced     an error state mechanism. The intent was that if a     fatal error occurred during a handshake then OpenSSL     would move into the error state and would immediately     fail if you attempted to continue the handshake. This     works as designed for the explicit handshake functions     (SSL_do_handshake(), SSL_accept() and SSL_connect()),     however due to a bug it does not work correctly if     SSL_read() or SSL_write() is called directly. In that     scenario, if the handshake fails then a fatal error will     be returned in the initial function call. If     SSL_read()/SSL_write() is subsequently called by the     application for the same SSL object then it will succeed     and the data is passed without being decrypted/encrypted     directly from the SSL/TLS record layer. In order to     exploit this issue an application bug would have to be     present that resulted in a call to     SSL_read()/SSL_write() being issued after having already     received a fatal error. OpenSSL version 1.0.2b-1.0.2m     are affected. Fixed in OpenSSL 1.0.2n. OpenSSL 1.1.0 is     not affected. (CVE-2017-3737)

  - There is an overflow bug in the AVX2 Montgomery     multiplication procedure used in exponentiation with     1024-bit moduli. No EC algorithms are affected. Analysis     suggests that attacks against RSA and DSA as a result of     this defect would be very difficult to perform and are     not believed likely. Attacks against DH1024 are     considered just feasible, because most of the work     necessary to deduce information about a private key may     be performed offline. The amount of resources required     for such an attack would be significant. However, for an     attack on TLS to be meaningful, the server would have to     share the DH1024 private key among multiple clients,     which is no longer an option since CVE-2016-0701. This     only affects processors that support the AVX2 but not     ADX extensions like Intel Haswell (4th generation).
    Note: The impact from this issue is similar to     CVE-2017-3736, CVE-2017-3732 and CVE-2015-3193. OpenSSL     version 1.0.2-1.0.2m and 1.1.0-1.1.0g are affected.
    Fixed in OpenSSL 1.0.2n. Due to the low severity of this     issue we are not issuing a new release of OpenSSL 1.1.0     at this time. The fix will be included in OpenSSL 1.1.0h     when it becomes available. The fix is also available in     commit e502cc86d in the OpenSSL git repository.
    (CVE-2017-3738)

  - There is a carry propagating bug in the x86_64     Montgomery squaring procedure in OpenSSL before 1.0.2m     and 1.1.0 before 1.1.0g. No EC algorithms are affected.
    Analysis suggests that attacks against RSA and DSA as a     result of this defect would be very difficult to perform     and are not believed likely. Attacks against DH are     considered just feasible (although very difficult)     because most of the work necessary to deduce information     about a private key may be performed offline. The amount     of resources required for such an attack would be very     significant and likely only accessible to a limited     number of attackers. An attacker would additionally need     online access to an unpatched system using the target     private key in a scenario with persistent DH parameters     and a private key that is shared between multiple     clients. This only affects processors that support the     BMI1, BMI2 and ADX extensions like Intel Broadwell (5th     generation) and later or AMD Ryzen. (CVE-2017-3736)

  - OpenSSL 0.9.7 before 0.9.7l and 0.9.8 before 0.9.8d     allows remote attackers to cause a denial of service     (infinite loop and memory consumption) via malformed     ASN.1 structures that trigger an improperly handled     error condition. (CVE-2006-2937)

  - OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and     earlier versions allows attackers to cause a denial of     service (CPU consumption) via parasitic public keys with     large (1) public exponent or (2) public modulus     values in X.509 certificates that require extra time to     process when using RSA signature verification.
    (CVE-2006-2940)

  - Buffer overflow in the SSL_get_shared_ciphers function     in OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and     earlier versions has unspecified impact and remote     attack vectors involving a long list of ciphers.
    (CVE-2006-3738)

  - OpenSSL before 0.9.7, 0.9.7 before 0.9.7k, and 0.9.8     before 0.9.8c, when using an RSA key with exponent 3,     removes PKCS-1 padding before generating a hash, which     allows remote attackers to forge a PKCS #1 v1.5     signature that is signed by that RSA key and prevents     OpenSSL from correctly verifying X.509 and other     certificates that use PKCS #1. (CVE-2006-4339)

  - The get_server_hello function in the SSLv2 client code     in OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and     earlier versions allows remote servers to cause a denial     of service (client crash) via unknown vectors that     trigger a null pointer dereference. (CVE-2006-4343)

  - The BN_from_montgomery function in crypto/bn/bn_mont.c     in OpenSSL 0.9.8e and earlier does not properly perform     Montgomery multiplication, which might allow local users     to conduct a side-channel attack and retrieve RSA     private keys. (CVE-2007-3108)

  - Off-by-one error in the DTLS implementation in OpenSSL     0.9.8 before 0.9.8f allows remote attackers to execute     arbitrary code via unspecified vectors. (CVE-2007-4995)

  - Off-by-one error in the SSL_get_shared_ciphers function     in OpenSSL 0.9.7 up to 0.9.7l, and 0.9.8 up to 0.9.8f,     might allow remote attackers to execute arbitrary code     via a crafted packet that triggers a one-byte buffer     underflow. NOTE: this issue was introduced as a result     of a fix for CVE-2006-3738. As of 20071012, it is     unknown whether code execution is possible.
    (CVE-2007-5135)

  - Double free vulnerability in OpenSSL 0.9.8f and 0.9.8g,     when the TLS server name extensions are enabled, allows     remote attackers to cause a denial of service (crash)     via a malformed Client Hello packet. NOTE: some of these     details are obtained from third party information.
    (CVE-2008-0891)

  - OpenSSL 0.9.8f and 0.9.8g allows remote attackers to     cause a denial of service (crash) via a TLS handshake     that omits the Server Key Exchange message and uses     particular cipher suites, which triggers a NULL     pointer dereference. (CVE-2008-1672)

  - The dtls1_buffer_record function in ssl/d1_pkt.c in     OpenSSL 0.9.8k and earlier 0.9.8 versions allows remote     attackers to cause a denial of service (memory     consumption) via a large series of future epoch DTLS     records that are buffered in a queue, aka DTLS record     buffer limitation bug. (CVE-2009-1377)

  - Multiple memory leaks in the     dtls1_process_out_of_seq_message function in     ssl/d1_both.c in OpenSSL 0.9.8k and earlier 0.9.8     versions allow remote attackers to cause a denial of     service (memory consumption) via DTLS records that (1)     are duplicates or (2) have sequence numbers much greater     than current sequence numbers, aka DTLS fragment     handling memory leak. (CVE-2009-1378)

  - Use-after-free vulnerability in the     dtls1_retrieve_buffered_fragment function in     ssl/d1_both.c in OpenSSL 1.0.0 Beta 2 allows remote     attackers to cause a denial of service (openssl s_client     crash) and possibly have unspecified other impact via a     DTLS packet, as demonstrated by a packet from a server     that uses a crafted server certificate. (CVE-2009-1379)

  - The TLS protocol, and the SSL protocol 3.0 and possibly     earlier, as used in Microsoft Internet Information     Services (IIS) 7.0, mod_ssl in the Apache HTTP Server     2.2.14 and earlier, OpenSSL before 0.9.8l, GnuTLS 2.8.5     and earlier, Mozilla Network Security Services (NSS)     3.12.4 and earlier, multiple Cisco products, and other     products, does not properly associate renegotiation     handshakes with an existing connection, which allows     man-in-the-middle attackers to insert data into HTTPS     sessions, and possibly other types of sessions protected     by TLS or SSL, by sending an unauthenticated request     that is processed retroactively by a server in a post-     renegotiation context, related to a plaintext     injection attack, aka the Project Mogul issue.
    (CVE-2009-3555)

  - Memory leak in the zlib_stateful_finish function in     crypto/comp/c_zlib.c in OpenSSL 0.9.8l and earlier and     1.0.0 Beta through Beta 4 allows remote attackers to     cause a denial of service (memory consumption) via     vectors that trigger incorrect calls to the     CRYPTO_cleanup_all_ex_data function, as demonstrated by     use of SSLv3 and PHP with the Apache HTTP Server, a     related issue to CVE-2008-1678. (CVE-2009-4355)

  - The Cryptographic Message Syntax (CMS) implementation in     crypto/cms/cms_asn1.c in OpenSSL before 0.9.8o and 1.x     before 1.0.0a does not properly handle structures that     contain OriginatorInfo, which allows context-dependent     attackers to modify invalid memory locations or conduct     double-free attacks, and possibly execute arbitrary     code, via unspecified vectors. (CVE-2010-0742)

  - RSA verification recovery in the EVP_PKEY_verify_recover     function in OpenSSL 1.x before 1.0.0a, as used by     pkeyutl and possibly other applications, returns     uninitialized memory upon failure, which might allow     context-dependent attackers to bypass intended key     requirements or obtain sensitive information via     unspecified vectors. NOTE: some of these details are     obtained from third party information. (CVE-2010-1633)

  - Multiple race conditions in ssl/t1_lib.c in OpenSSL     0.9.8f through 0.9.8o, 1.0.0, and 1.0.0a, when multi-     threading and internal caching are enabled on a TLS     server, might allow remote attackers to execute     arbitrary code via client data that triggers a heap-     based buffer overflow, related to (1) the TLS server     name extension and (2) elliptic curve cryptography.
    (CVE-2010-3864)

  - OpenSSL before 0.9.8q, and 1.0.x before 1.0.0c, when     SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG is enabled, does     not properly prevent modification of the ciphersuite in     the session cache, which allows remote attackers to     force the downgrade to an unintended cipher via vectors     involving sniffing network traffic to discover a session     identifier. (CVE-2010-4180)

  - ssl/t1_lib.c in OpenSSL 0.9.8h through 0.9.8q and 1.0.0     through 1.0.0c allows remote attackers to cause a denial     of service (crash), and possibly obtain sensitive     information in applications that use OpenSSL, via a     malformed ClientHello handshake message that triggers an     out-of-bounds memory access, aka OCSP stapling     vulnerability. (CVE-2011-0014)

  - crypto/x509/x509_vfy.c in OpenSSL 1.0.x before 1.0.0e     does not initialize certain structure members, which     makes it easier for remote attackers to bypass CRL     validation by using a nextUpdate value corresponding to     a time in the past. (CVE-2011-3207)

  - OpenSSL 0.9.8s and 1.0.0f does not properly support DTLS     applications, which allows remote attackers to cause a     denial of service (crash) via unspecified vectors     related to an out-of-bounds read. NOTE: this     vulnerability exists because of an incorrect fix for     CVE-2011-4108. (CVE-2012-0050)

  - The asn1_d2i_read_bio function in crypto/asn1/a_d2i_fp.c     in OpenSSL before 0.9.8v, 1.0.0 before 1.0.0i, and 1.0.1     before 1.0.1a does not properly interpret integer data,     which allows remote attackers to conduct buffer overflow     attacks, and cause a denial of service (memory     corruption) or possibly have unspecified other impact,     via crafted DER data, as demonstrated by an X.509     certificate or an RSA public key. (CVE-2012-2110)

  - The ssl3_take_mac function in ssl/s3_both.c in OpenSSL     1.0.1 before 1.0.1f allows remote TLS servers to cause a     denial of service (NULL pointer dereference and     application crash) via a crafted Next Protocol     Negotiation record in a TLS handshake. (CVE-2013-4353)

  - The ssl_get_algorithm2 function in ssl/s3_lib.c in     OpenSSL before 1.0.2 obtains a certain version number     from an incorrect data structure, which allows remote     attackers to cause a denial of service (daemon crash)     via crafted traffic from a TLS 1.2 client.
    (CVE-2013-6449)

  - The DTLS retransmission implementation in OpenSSL 1.0.0     before 1.0.0l and 1.0.1 before 1.0.1f does not properly     maintain data structures for digest and encryption     contexts, which might allow man-in-the-middle attackers     to trigger the use of a different context and cause a     denial of service (application crash) by interfering     with packet delivery, related to ssl/d1_both.c and     ssl/t1_enc.c. (CVE-2013-6450)

  - An information disclosure flaw was found in the way     OpenSSL handled TLS and DTLS Heartbeat Extension     packets. A malicious TLS or DTLS client or server could     send a specially crafted TLS or DTLS Heartbeat packet to     disclose a limited portion of memory per request from a     connected client or server. Note that the disclosed     portions of memory could potentially include sensitive     information such as private keys. (CVE-2014-0160)

  - A flaw was found in the way SSL 3.0 handled padding     bytes when decrypting messages encrypted using block     ciphers in cipher block chaining (CBC) mode. This flaw     allows a man-in-the-middle (MITM) attacker to decrypt a     selected byte of a cipher text in as few as 256 tries if     they are able to force a victim application to     repeatedly send the same data over newly created SSL 3.0     connections. (CVE-2014-3566)

  - A flaw was found in the way the DES/3DES cipher was used     as part of the TLS/SSL protocol. A man-in-the-middle     attacker could use this flaw to recover some plaintext     data by capturing large amounts of encrypted traffic     between TLS/SSL server and client if the communication     used a DES/3DES based ciphersuite. (CVE-2016-2183)

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

Versions of OpenSSL earlier than 0.9.8h are potentially affected by multiple vulnerabilities :

  - A double-free error exists related to the handling of server name extension data and specially crafted TLS 1.0 'Client Hello' packets.  This can cause application crashes.  Note that successful exploitation requires that OpenSSL is compiled with the TLS server name extensions. (CVE-2008-0891)

  - A NULL pointer dereference error exists related to anonymous Diffie-Hellman key exchange and TLS handshakes.  This can be exploited by omitting the 'Server Key exchange message' from the handshake and can cause application crashes. (CVE-2008-1672)

  - On 32-bit builds, an information disclosure vulnerability exists during certain calculations for NIST elliptic curves P-256 or P-384.  This error can allow an attacker to recover the private key of the TLS server.

  The following are required for exploitation :

    - 32-bit build

    - Use of elliptic curves P-256 and/or P-384

    - Either the use of ECDH family ciphers and/or the use of ECDHE family ciphers without the SSL_OP_SINGLE_ECDH_USE context option. (CVE-2011-4354)

According to its banner, the remote web server uses a version of OpenSSL older than 0.9.8h.  As such, it may be affected by the following vulnerabilities :

  - A double-free error exists related to the handling of     server name extension data and specially crafted TLS     1.0 'Client Hello' packets. This can cause application     crashes. Note that successful exploitation requires that     OpenSSL is compiled with the TLS server name extensions.
    (CVE-2008-0891)

  - A NULL pointer dereference error exists related to     anonymous Diffie-Hellman key exchange and TLS     handshakes. This can be exploited by omitting the     'Server Key exchange message' from the handshake and     can cause application crashes. (CVE-2008-1672)

  - On 32-bit builds, an information disclosure     vulnerability exists during certain calculations for     NIST elliptic curves P-256 or P-384. This error can     allow an attacker to recover the private key of the TLS     server. 

    The following are required for exploitation :

      - 32-bit build
      - Use of elliptic curves P-256 and/or P-384
      - Either the use of ECDH family ciphers and/or the         use of ECDHE family ciphers without the         SSL_OP_SINGLE_ECDH_USE context option 

    (CVE-2011-4354)

Note that Nessus has not attempted to verify that these issues are actually exploitable or have been patched but instead has relied on the version number found in the Server response header.

Testing using the Codenomicon TLS test suite discovered a flaw in the handling of server name extension data in OpenSSL 0.9.8f and OpenSSL 0.9.8g. If OpenSSL has been compiled using the non-default TLS server name extensions, a remote attacker could send a carefully crafted packet to a server application using OpenSSL and cause a crash.
(CVE-2008-0891)

Testing using the Codenomicon TLS test suite discovered a flaw if the 'Server Key exchange message' is omitted from a TLS handshake in OpenSSL 0.9.8f and OpenSSL 0.9.8g. If a client connects to a malicious server with particular cipher suites, the server could cause the client to crash. (CVE-2008-1672)

The updated packages have been patched to fix these flaws.

Note that any applications using this library must be restarted for the update to take effect.

New openssl packages are available for Slackware 11.0, 12.0, 12.1, and -current to fix security issues.

It was discovered that OpenSSL was vulnerable to a double-free when using TLS server extensions. A remote attacker could send a crafted packet and cause a denial of service via application crash in applications linked against OpenSSL. Ubuntu 8.04 LTS does not compile TLS server extensions by default. (CVE-2008-0891)

It was discovered that OpenSSL could dereference a NULL pointer. If a user or automated system were tricked into connecting to a malicious server with particular cipher suites, a remote attacker could cause a denial of service via application crash. (CVE-2008-1672).

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

The remote host is affected by the vulnerability described in GLSA-200806-08 (OpenSSL: Denial of Service)

    Ossi Herrala and Jukka Taimisto of Codenomicon discovered two     vulnerabilities:
    A double free() call in the TLS server name extension (CVE-2008-0891).
    The OpenSSL client code does not properly handle servers that omit the     Server Key Exchange message in the TLS handshake (CVE-2008-1672).
  Impact :

    A remote attacker could connect to a vulnerable server, or entice a     daemon to connect to a malicious server, causing a Denial of Service of     the daemon in both cases.
  Workaround :

    There is no known workaround at this time.

Fixes moderate impact security issue CVE-2008-0891 and low impact security issue CVE-2008-1672. See also http://www.openssl.org/news/secadv/20080528.txt All applications and system services which utilize OpenSSL library must be restarted for the updates to take effect.

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

ID	Name	Product	Family	Severity
127201	NewStart CGSL CORE 5.04 / MAIN 5.04 : openssl Multiple Vulnerabilities (NS-SA-2019-0033)	Nessus	NewStart CGSL Local Security Checks	high
801061	OpenSSL < 0.9.8h Multiple Vulnerabilities	Log Correlation Engine	Web Servers	medium
56996	OpenSSL < 0.9.8h Multiple Vulnerabilities	Nessus	Web Servers	medium
4521	OpenSSL < 0.9.8h Multiple Vulnerabilities	Nessus Network Monitor	Web Servers	low
37882	Mandriva Linux Security Advisory : openssl (MDVSA-2008:107)	Nessus	Mandriva Local Security Checks	medium
33753	Slackware 11.0 / 12.0 / 12.1 / current : openssl (SSA:2008-210-08)	Nessus	Slackware Local Security Checks	medium
33389	Ubuntu 8.04 LTS : openssl vulnerabilities (USN-620-1)	Nessus	Ubuntu Local Security Checks	medium
33244	GLSA-200806-08 : OpenSSL: Denial of Service	Nessus	Gentoo Local Security Checks	medium
32484	Fedora 9 : openssl-0.9.8g-9.fc9 (2008-4723)	Nessus	Fedora Local Security Checks	medium

Detections

Analytics

CVE-2008-1672

high

Tenable Plugins

high

medium

medium

low

medium

medium

medium

medium

medium