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Alerts This Week
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Gentoo 201404-07 Normal: OpenSSL Information Disclosure Attack

gentoo
Calendar Grey April 8, 2014
Scroller Gentoo
Several OpenSSL security vulnerabilities can enable distant attackers to access confidential information on Gentoo platforms. Act swiftly to upgrade!
Multiple Information Disclosure vulnerabilities in OpenSSL allow remote attackers to obtain sensitive information via various vectors.

Summary

Multiple vulnerabilities have been found in OpenSSL: * OpenSSL incorrectly handles memory in the TLS heartbeat extension, leading to information disclosure of 64kb per request, possibly including private keys ("Heartbleed bug", OpenSSL 1.0.1 only, CVE-2014-0160). * The Montgomery ladder implementation of OpenSSL improperly handles swap operations (CVE-2014-0076).

Topics%20covered

Topics Covered

security advisory gentoo remote threat information disclosure openssl normal severity

Resolution

All OpenSSL users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=dev-libs/openssl-1.0.1g"
Note: All services using OpenSSL to provide TLS connections have to be restarted for the update to take effect. Utilities like app-admin/lib_users can aid in identifying programs using OpenSSL.
As private keys may have been compromised using the Heartbleed attack, it is recommended to regenerate them.

References

[ 1 ] CVE-2014-0076 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-0076 [ 2 ] CVE-2014-0160 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-0160 [ 3 ] Heartbleed bug website https://heartbleed.com/

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201404-07
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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.

Severity: Normal
Title: OpenSSL: Information Disclosure
Date: April 08, 2014
Bugs: #505278, #507074
ID: 201404-07

Topics%20covered

Topics Covered

security advisory gentoo remote threat information disclosure openssl normal severity

Synopsis

Multiple Information Disclosure vulnerabilities in OpenSSL allow remote attackers to obtain sensitive information via various vectors.

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.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 dev-libs/openssl < 1.0.1g >= 1.0.1g

Impact

===== A remote attacker could exploit these issues to disclose information, including private keys or other sensitive information, or perform side-channel attacks to obtain ECDSA nonces.

Workaround

Disabling the tls-heartbeat USE flag (enabled by default) provides a workaround for the CVE-2014-0160 issue.