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Gentoo: GLSA-201706-22 Normal: Libksba Denial Of Service & Info Leak

gentoo
Calendar Grey June 22, 2017
Scroller Gentoo Esm H88
Investigate the Gentoo advisory regarding libksba security issues, which could lead to denial of service and potential information exposure for affected users.
Multiple vulnerabilities have been found in libksba which might allow remote attackers to obtain sensitive information or crash an libksba-based application

Summary

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.

Topics%20covered

Topics Covered

security advisory denial of service information leak gentoo remote attack normal severity libksba

Resolution

All libksba users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=dev-libs/libksba-1.3.5"

References

[ 1 ] CVE-2016-4579 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-4579 [ 2 ] Upstream report http://seclists.org/oss-sec/2016/q3/343

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201706-22
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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: libksba: Denial of Service and information disclosure
Date: June 22, 2017
Bugs: #592078
ID: 201706-22

Topics%20covered

Topics Covered

security advisory denial of service information leak gentoo remote attack normal severity libksba

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.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 dev-libs/libksba < 1.3.5 >= 1.3.5

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.