GLSA 201706-22: libksba: Denial of Service and information disclosure

http://security.gentoo.org/

Severity:	normal
Title:	libksba: Denial of Service and information disclosure
Date:	06/22/2017
Bugs:	#592078
ID:	201706-22

Synopsis

Multiple vulnerabilities have been found in libksba which might allow remote attackers to obtain sensitive information or crash an libksba-based application.

Background

Libksba is a X.509 and CMS (PKCS#7) library.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
dev-libs/libksba	< 1.3.5	>= 1.3.5	All supported architectures

Description

It was found that an unproportionate amount of memory is allocated when parsing crafted certificates in libskba, which may lead to Denial of Service condition.

Moreover in libksba 1.3.4, allocated memory is uninitialized and could potentially contain sensitive data left in freed memory block.

Impact

A remote attacker, able to interact with an libksba-based application, could possibly obtain sensitive information or cause a Denial of Service condition.

Workaround

There is no known workaround at this time.

Resolution

All libksba users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=dev-libs/libksba-1.3.5"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201706-22.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.