GLSA 201610-04: libgcrypt: Multiple vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	libgcrypt: Multiple vulnerabilities
Date:	10/10/2016
Bugs:	#541564, #559942, #574268, #591534
ID:	201610-04

Synopsis

Multiple vulnerabilities have been fixed in libgcrypt,the worst of which results in predictable output from the random number generator.

Background

libgcrypt is a general purpose cryptographic library derived out of GnuPG.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
dev-libs/libgcrypt	< 1.7.3	>= 1.7.3	All supported architectures

Description

Multiple vulnerabilities have been discovered in libgcrypt. Please review the CVE identifiers referenced below for details.

Impact

Side-channel attacks can leak private key information. A separate critical bug allows an attacker who obtains 4640 bits from the RNG to trivially predict the next 160 bits of output.

Workaround

There is no known workaround at this time.

Resolution

All libgcrypt users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=dev-libs/libgcrypt-1.7.3"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201610-04.xml

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.