OpenSSL: Remote execution of arbitrary code

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200710-30 / openssl
Release Date	October 27, 2007
Latest Revision	October 30, 2007: 03
Impact	high
Exploitable	remote

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

Related bugreports: #195634

Synopsis

OpenSSL contains a vulnerability allowing execution of arbitrary code or a Denial of Service.

2. Impact Information

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.

Description

Andy Polyakov reported a vulnerability in the OpenSSL toolkit, that is caused due to an unspecified off-by-one error within the DTLS implementation.

Impact

A remote attacker could exploit this issue to execute arbitrary code or cause a Denial of Service. Only clients and servers explicitly using DTLS are affected, systems using SSL and TLS are not.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All OpenSSL users should upgrade to the latest version:

Code Listing 3.1: Resolution

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

4. References

CVE-2007-4995

Updated October 27, 2007

Summary: This is a Gentoo Linux Security Advisory

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