[ GLSA 201603-15 ] OpenSSL

[GLSA]

Gentoo Linux Security Advisory

Title: OpenSSL: Multiple vulnerabilities (GLSA 201603-15)
Severity: normal
Exploitable: remote
Date: March 20, 2016
Bug(s): #575548
ID: 201603-15

Synopsis

Multiple vulnerabilities have been found in OpenSSL, the worst
allowing remote attackers to decrypt TLS sessions.


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.


Affected Packages

Package: dev-libs/openssl
Vulnerable: < 1.0.2g-r2
Unaffected: >= 1.0.2g-r2
Architectures: All supported architectures


Description

Multiple vulnerabilities have been discovered in OpenSSL, the worst
being a cross-protocol attack called DROWN that could lead to the
decryption of TLS sessions. Please review the CVE identifiers referenced
below for details.


Impact

A remote attacker could decrypt TLS sessions by using a server
supporting SSLv2 and EXPORT cipher suites as a
Bleichenbacher RSA padding oracle, cause a Denial of Service condition,
obtain sensitive information from memory and (in rare circumstances)
recover RSA keys.


Workaround

A workaround for DROWN is disabling the SSLv2 protocol on all SSL/TLS
servers.


Resolution

All OpenSSL users should upgrade to the latest version: