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Test ID:
Category:Red Hat Local Security Checks
Title:RedHat Security Advisory RHSA-2007:0964

The remote host is missing updates announced in
advisory RHSA-2007:0964.

OpenSSL is a toolkit that implements 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 (UDP for

The OpenSSL security team discovered a flaw in DTLS support. An attacker
could create a malicious client or server that could trigger a heap
overflow. This is possibly exploitable to run arbitrary code, but it has
not been verified (CVE-2007-5135). Note that this flaw only affects
applications making use of DTLS. Red Hat does not ship any DTLS client or
server applications in Red Hat Enterprise Linux.

A flaw was found in the SSL_get_shared_ciphers() utility function. An
attacker could send a list of ciphers to an application that used this
function and overrun a buffer with a single byte (CVE-2007-4995). Few
applications make use of this vulnerable function and generally it is used
only when applications are compiled for debugging.

A number of possible side-channel attacks were discovered affecting
OpenSSL. A local attacker could possibly obtain RSA private keys being
used on a system. In practice these attacks would be difficult to perform
outside of a lab environment. This update contains backported patches
designed to mitigate these issues. (CVE-2007-3108).

Users of OpenSSL should upgrade to these updated packages, which contain
backported patches to resolve these issues.

Please note that the fix for the DTLS flaw involved an overhaul of the DTLS
handshake processing which may introduce incompatibilities if a new client
is used with an older server.

After installing this update, users are advised to either restart all
services that use OpenSSL or restart their system.

Please note that this update is available via
Red Hat Network. To use Red Hat Network, launch the Red
Hat Update Agent with the following command: up2date

Risk factor : Critical

CVSS Score:

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2007-3108
BugTraq ID: 25163
Bugtraq: 20070813 FLEA-2007-0043-1 openssl (Google Search)
Bugtraq: 20080108 VMSA-2008-0001 Moderate OpenPegasus PAM Authentication Buffer Overflow and updated service console packages (Google Search)
Bugtraq: 20080123 UPDATED VMSA-2008-0001.1 Moderate OpenPegasus PAM Authentication Buffer Overflow and updated service console packages (Google Search)
CERT/CC vulnerability note: VU#724968
Debian Security Information: DSA-1571 (Google Search)
Common Vulnerability Exposure (CVE) ID: CVE-2007-4995
BugTraq ID: 26055
Bugtraq: 20071012 OpenSSL Security Advisory (Google Search)
HPdes Security Advisory: HPSBUX02296
HPdes Security Advisory: SSRT071504
SuSE Security Announcement: SUSE-SR:2007:021 (Google Search)
XForce ISS Database: openssl-dtls-code-execution(37185)
Common Vulnerability Exposure (CVE) ID: CVE-2007-5135
BugTraq ID: 25831
Bugtraq: 20070927 OpenSSL SSL_get_shared_ciphers() off-by-one buffer overflow (Google Search)
Bugtraq: 20071004 Re: OpenSSL SSL_get_shared_ciphers() off-by-one buffer overflow (Google Search)
Bugtraq: 20071003 FLEA-2007-0058-1 openssl openssl-scripts (Google Search)
Debian Security Information: DSA-1379 (Google Search)
FreeBSD Security Advisory: FreeBSD-SA-07:08
HPdes Security Advisory: HPSBUX02292
HPdes Security Advisory: SSRT071499
NETBSD Security Advisory: NetBSD-SA2008-007
OpenBSD Security Advisory: [4.0] 017: SECURITY FIX: October 10, 2007
OpenBSD Security Advisory: [4.1] 011: SECURITY FIX: October 10, 2007
OpenBSD Security Advisory: [4.2] 002: SECURITY FIX: October 10, 2007
SuSE Security Announcement: SUSE-SR:2007:020 (Google Search)
SuSE Security Announcement: SUSE-SR:2008:005 (Google Search)
XForce ISS Database: openssl-sslgetshared-bo(36837)
CopyrightCopyright (c) 2007 E-Soft Inc.

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