OpenSSL: Denial of Service

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200904-08 / openssl
Release Date	April 07, 2009
Latest Revision	April 07, 2009: 01
Impact	normal
Exploitable	remote

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

Related bugreports: #263751

Synopsis

An error in OpenSSL might allow for a Denial of Service when printing certificate details.

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

The ASN1_STRING_print_ex() function does not properly check the provided length of a BMPString or UniversalString, leading to an invalid memory access.

Impact

A remote attacker could entice a user or automated system to print a specially crafted certificate, possibly leading to a Denial of Service.

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-0.9.8k"

4. References

CVE-2009-0590

Page updated April 07, 2009

Summary: This is a Gentoo Linux Security Advisory

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