GLSA 200806-08: OpenSSL: Denial of Service

http://security.gentoo.org/

Severity:	normal
Title:	OpenSSL: Denial of Service
Date:	06/23/2008
Bugs:	#223429
ID:	200806-08

Synopsis

Two vulnerabilities might allow for a Denial of Service of daemons using OpenSSL.

Background

OpenSSL is an Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) as well as a general purpose cryptography library.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
dev-libs/openssl	< 0.9.8g-r2	>= 0.9.8g-r2	All supported architectures

Description

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.

Resolution

All OpenSSL users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-libs/openssl-0.9.8g-r2"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200806-08.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.