OpenSSL: Denial of service

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.

Workaround

There is no known workaround at this time.

Resolution

All OpenSSL 1.0.1 users should upgrade to the latest version:

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