OpenSSL: Multiple vulnerabilities
Gentoo Linux Security Advisory
||GLSA 201203-12 / openssl
||March 06, 2012
||September 17, 2013: 7
All supported architectures
Multiple vulnerabilities have been found in OpenSSL, allowing
remote attackers to cause a Denial of Service or obtain sensitive
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.
Multiple vulnerabilities have been found in OpenSSL:
- Timing differences for decryption are exposed by CBC mode encryption
in OpenSSL’s implementation of DTLS (CVE-2011-4108).
- A policy check failure can result in a double-free error when
X509_V_FLAG_POLICY_CHECK is set (CVE-2011-4109).
- Clients and servers using SSL 3.0 handshakes do not clear the block
cipher padding, allowing a record to contain up to 15 bytes of
uninitialized memory, which could include sensitive information
- Assertion errors can occur during the handling of malformed X.509
certificates when OpenSSL is built with RFC 3779 support
- A resource management error can occur when OpenSSL’s server gated
cryptography (SGC) does not properly handle handshake restarts
- Invalid parameters in the GOST block cipher are not properly handled
by the GOST ENGINE(CVE-2012-0027).
- An incorrect fix for CVE-2011-4108 creates an unspecified
vulnerability for DTLS applications using OpenSSL (CVE-2012-0050).
A remote attacker may be able to cause a Denial of Service or obtain
sensitive information, including plaintext passwords.
There is no known workaround at this time.
All OpenSSL users should upgrade to the latest version:
Code Listing 3.1: Resolution
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/openssl-1.0.0g"