Gentoo: GLSA-201203-12: OpenSSL: Multiple vulnerabilities
Summary
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
(CVE-2011-4576).
* Assertion errors can occur during the handling of malformed X.509
certificates when OpenSSL is built with RFC 3779 support
(CVE-2011-4577).
* A resource management error can occur when OpenSSL's server gated
cryptography (SGC) does not properly handle handshake restarts
(CVE-2011-4619).
* 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).
Resolution
All OpenSSL users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/openssl-1.0.0g"
References
[ 1 ] CVE-2011-4108 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-4108 [ 2 ] CVE-2011-4109 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-4109 [ 3 ] CVE-2011-4576 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-4576 [ 4 ] CVE-2011-4577 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-4577 [ 5 ] CVE-2011-4619 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-4619 [ 6 ] CVE-2012-0027 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-0027 [ 7 ] CVE-2012-0050 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-0050
Availability
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/201203-12
Concerns
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.
Synopsis
Multiple vulnerabilities have been found in OpenSSL, allowing remote attackers to cause a Denial of Service or obtain sensitive 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.
Affected Packages
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 dev-libs/openssl < 1.0.0g *>= 0.9.8t >= 1.0.0g
Impact
===== A remote attacker may be able to cause a Denial of Service or obtain sensitive information, including plaintext passwords.
Workaround
There is no known workaround at this time.
