The mime_hdr_cmp function in crypto/asn1/asn_mime.c in OpenSSL 0.9.8t and earlier allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted S/MIME message.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - The mime_hdr_cmp function in crypto/asn1/asn_mime.c in OpenSSL 0.9.8t and earlier allows remote attackers     to cause a denial of service (NULL pointer dereference and application crash) via a crafted S/MIME     message. (CVE-2006-7250)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Oracle Linux 5 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2009-1335 advisory.

    - fix CVE-2009-1386 CVE-2009-1387 (DTLS DoS problems)       (#503685, #503688)
    - fix CVE-2009-1377 CVE-2009-1378 CVE-2009-1379       (DTLS DoS problems) (#501253, #501254, #501572)
    - fix CVE-2009-0590 - reject incorrectly encoded ASN.1 strings (#492304)

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

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

Specially crafted MIME headers could crash openssl's ASN.1 parser

The remote host is affected by the vulnerability described in GLSA-201312-03 (OpenSSL: Multiple Vulnerabilities)

    Multiple vulnerabilities have been discovered in OpenSSL. Please review       the CVE identifiers referenced below for details.
  Impact :

    Remote attackers can determine private keys, decrypt data, cause a       Denial of Service or possibly have other unspecified impact.
  Workaround :

    There is no known workaround at this time.

The remote Redhat Enterprise Linux 5 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2009:1335 advisory.

  - openssl: mime_hdr_cmp NULL dereference crash (CVE-2006-7250)

  - openssl: ASN1 printing crash (CVE-2009-0590)

  - OpenSSL: DTLS epoch record buffer memory DoS (CVE-2009-1377)

  - OpenSSL: DTLS fragment handling memory DoS (CVE-2009-1378)

  - OpenSSL: DTLS pointer use-after-free flaw (DoS) (CVE-2009-1379)

  - openssl: DTLS NULL deref crash on early ChangeCipherSpec request (CVE-2009-1386)

  - openssl: DTLS out-of-sequence message handling NULL deref DoS (CVE-2009-1387)

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

It was discovered that OpenSSL could be made to dereference a NULL pointer when processing S/MIME messages. A remote attacker could use this to cause a denial of service. These issues did not affect Ubuntu 8.04 LTS. (CVE-2006-7250, CVE-2012-1165)

Tavis Ormandy discovered that OpenSSL did not properly perform bounds checking when processing DER data via BIO or FILE functions. A remote attacker could trigger this flaw in services that used SSL to cause a denial of service or possibly execute arbitrary code with application privileges. (CVE-2012-2110).

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 following security issue has been fixed :

  - Specially crafted MIME headers could cause OpenSSL's     ans1 parser to dereference a NULL pointer leading to a     Denial of Service (CVE-2006-7250) or fail verfication.
    (CVE-2012-1165)

Additionally, two other bugs have been fixed :

  - free() headers after use in error message. (bnc#749213)

  - symmetric crypto errors in PKCS7_decrypt. (bnc#749210)

The following security issues have been fixed :

  - Specially crafted MIME headers could cause openssl's     ans1 parser to dereference a NULL pointer leading to a     Denial of Service (CVE-2006-7250) or fail verfication.
    (CVE-2012-1165)

  - The implementation of Cryptographic Message Syntax (CMS)     and PKCS #7 in OpenSSL was vulnerable to a Million     Message Attack (MMA) adaptive chosen ciphertext attack.
    (CVE-2012-0884)

Additionally, the following issues have been fixed :

  - Free headers after use in error message. (bnc#749213)

  - Symmetric crypto errors in PKCS7_decrypt. (bnc#749210)

  - Memory leak when creating public keys. (bnc#749735)

Updated openssl packages that fix several security issues, various bugs, and add enhancements are now available for Red Hat Enterprise Linux 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols, as well as a full-strength general purpose cryptography library. Datagram TLS (DTLS) is a protocol based on TLS that is capable of securing datagram transport (for example, UDP).

Multiple denial of service flaws were discovered in OpenSSL's DTLS implementation. A remote attacker could use these flaws to cause a DTLS server to use excessive amounts of memory, or crash on an invalid memory access or NULL pointer dereference. (CVE-2009-1377, CVE-2009-1378, CVE-2009-1379, CVE-2009-1386, CVE-2009-1387)

Note: These flaws only affect applications that use DTLS. Red Hat does not ship any DTLS client or server applications in Red Hat Enterprise Linux.

An input validation flaw was found in the handling of the BMPString and UniversalString ASN1 string types in OpenSSL's ASN1_STRING_print_ex() function. An attacker could use this flaw to create a specially crafted X.509 certificate that could cause applications using the affected function to crash when printing certificate contents. (CVE-2009-0590)

Note: The affected function is rarely used. No application shipped with Red Hat Enterprise Linux calls this function, for example.

These updated packages also fix the following bugs :

* 'openssl smime -verify -in' verifies the signature of the input file and the '-verify' switch expects a signed or encrypted input file.
Previously, running openssl on an S/MIME file that was not encrypted or signed caused openssl to segfault. With this update, the input file is now checked for a signature or encryption. Consequently, openssl now returns an error and quits when attempting to verify an unencrypted or unsigned S/MIME file. (BZ#472440)

* when generating RSA keys, pairwise tests were called even in non-FIPS mode. This prevented small keys from being generated. With this update, generating keys in non-FIPS mode no longer calls the pairwise tests and keys as small as 32-bits can be generated in this mode. Note: In FIPS mode, pairwise tests are still called and keys generated in this mode must still be 1024-bits or larger. (BZ#479817)

As well, these updated packages add the following enhancements :

* both the libcrypto and libssl shared libraries, which are part of the OpenSSL FIPS module, are now checked for integrity on initialization of FIPS mode. (BZ#475798)

* an issuing Certificate Authority (CA) allows multiple certificate templates to inherit the CA's Common Name (CN). Because this CN is used as a unique identifier, each template had to have its own Certificate Revocation List (CRL). With this update, multiple CRLs with the same subject name can now be stored in a X509_STORE structure, with their signature field being used to distinguish between them. (BZ#457134)

* the fipscheck library is no longer needed for rebuilding the openssl source RPM. (BZ#475798)

OpenSSL users should upgrade to these updated packages, which resolve these issues and add these enhancements.

ID	Name	Product	Family	Type	Severity
217045	Linux Distros Unpatched Vulnerability : CVE-2006-7250	Nessus	Misc.	Local	high
180619	Oracle Linux 5 : openssl (ELSA-2009-1335)	Nessus	Oracle Linux Local Security Checks	Local	high
74573	openSUSE Security Update : openssl (openSUSE-SU-2012:0414-1)	Nessus	SuSE Local Security Checks	Local	medium
71169	GLSA-201312-03 : OpenSSL: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	Local	high
63892	RHEL 5 : openssl (RHSA-2009:1335)	Nessus	Red Hat Local Security Checks	Local	high
58808	Ubuntu 8.04 LTS / 10.04 LTS / 11.04 / 11.10 : openssl vulnerabilities (USN-1424-1)	Nessus	Ubuntu Local Security Checks	Local	high
58679	SuSE 10 Security Update : OpenSSL (ZYPP Patch Number 8034)	Nessus	SuSE Local Security Checks	Local	medium
58678	SuSE 11.1 Security Update : OpenSSL (SAT Patch Number 6054)	Nessus	SuSE Local Security Checks	Local	medium
58677	SuSE 11.1 Security Update : OpenSSL (SAT Patch Number 6054)	Nessus	SuSE Local Security Checks	Local	medium
43785	CentOS 5 : openssl (CESA-2009:1335)	Nessus	CentOS Local Security Checks	Local	medium

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CVE-2006-7250

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