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OpenSSL: Denial of Service

Content:

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 201402-25 / openssl
Release Date February 21, 2014
Latest Revision February 21, 2014: 1
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
dev-libs/openssl < 1.0.1f >= 1.0.1f, < 1.0.1 All supported architectures

Related bugreports: #497838

Synopsis

A vulnerability in OpenSSL's handling of TLS handshakes could result in a Denial of Service condition.

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

A flaw in the ssl3_take_mac function can result in a NULL pointer dereference.

Impact

A remote attacker could send a specially crafted TLS handshake, resulting in a Denial of Service condition.

3.  Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All OpenSSL 1.0.1 users should upgrade to the latest version:

Code Listing 3.1: Resolution

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=dev-libs/openssl-1.0.1f"

4.  References



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Page updated February 21, 2014

Summary: This is a Gentoo Linux Security Advisory

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