Libtasn1: Denial of Service — GLSA 201209-12

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

Affected Packages

dev-libs/libtasn1 on all architectures
Affected versions < 2.12
Unaffected versions >= 2.12

Background

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

Description

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

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.

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

Release Date
September 25, 2012

Latest Revision
September 25, 2012: 1

Severity
normal

Exploitable
remote

Bugzilla entries