GLSA 200612-11: AMD64 x86 emulation base libraries: OpenSSL multiple vulnerabilities

http://security.gentoo.org/

Severity:	high
Title:	AMD64 x86 emulation base libraries: OpenSSL multiple vulnerabilities
Date:	12/11/2006
Bugs:	#152640
ID:	200612-11

Synopsis

OpenSSL contains multiple vulnerabilities including the possible execution of remote arbitrary code.

Background

OpenSSL is a toolkit implementing the Secure Sockets Layer, Transport Layer Security protocols and a general-purpose cryptography library. The x86 emulation base libraries for AMD64 contain a vulnerable version of OpenSSL.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
app-emulation/emul-linux-x86-baselibs	< 2.5.5	>= 2.5.5	amd64

Description

Tavis Ormandy and Will Drewry, both of the Google Security Team, discovered that the SSL_get_shared_ciphers() function contains a buffer overflow vulnerability, and that the SSLv2 client code contains a flaw leading to a crash. Additionally, Dr. Stephen N. Henson found that the ASN.1 handler contains two Denial of Service vulnerabilities: while parsing an invalid ASN.1 structure and while handling certain types of public key.

Impact

An attacker could trigger the buffer overflow by sending a malicious suite of ciphers to an application using the vulnerable function, and thus execute arbitrary code with the rights of the user running the application. An attacker could also consume CPU and/or memory by exploiting the Denial of Service vulnerabilities. Finally, a malicious server could crash a SSLv2 client through the SSLv2 vulnerability.

Workaround

There is no known workaround at this time.

Resolution

All AMD64 x86 emulation base libraries users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-emulation/emul-linux-x86-baselibs-2.5.5"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200612-11.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.