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Gentoo: 201209-12 Normal: Libtasn1 DoS Risk and Resolution

gentoo
Calendar Grey September 25, 2012
Dist Gentoo Esm H88
Explore Gentoo's GLSA 202204-18 highlighting an issue with libgcrypt that could lead to unintended system compromises. Understand how to fortify your environment.
A vulnerability in Libtasn1 might cause a Denial of Service condition.

Summary

Libtasn1 does not properly handle length fields when performing DER decoding.

Topics%20covered

Topics Covered

security advisory denial of service gentoo advisory system upgrade normal libtasn1

Resolution

All Libtasn1 users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=dev-libs/libtasn1-2.12"
Packages which depend on this library may need to be recompiled. Tools such as revdep-rebuild may assist in identifying some of these packages.

References

[ 1 ] CVE-2012-1569 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-1569

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201209-12
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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: Libtasn1: Denial of Service
Date: September 25, 2012
Bugs: #409031
ID: 201209-12

Topics%20covered

Topics Covered

security advisory denial of service gentoo advisory system upgrade normal libtasn1

Synopsis

A vulnerability in Libtasn1 might cause a Denial of Service condition.

Background

Libtasn1 is a library used to parse ASN.1 (Abstract Syntax Notation One) objects, and perform DER (Distinguished Encoding Rules) decoding.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 dev-libs/libtasn1 < 2.12 >= 2.12

Impact

===== A remote attacker could entice a user to open a specially crafted DER-encoded object in an application linked against Libtasn1, possibly resulting in Denial of Service.

Workaround

There is no known workaround at this time.

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