GLSA Advocate
Joined: 12 May 2004 Posts: 2663
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Posted: Thu Feb 16, 2006 9:20 pm Post subject: [ GLSA 200602-08 ] libtasn1, GNU TLS: Security flaw in DER d |
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Gentoo Linux Security Advisory
Title: libtasn1, GNU TLS: Security flaw in DER decoding (GLSA 200602-08)
Severity: high
Exploitable: remote
Date: February 16, 2006
Bug(s): #122307
ID: 200602-08
Synopsis
A flaw in the parsing of Distinguished Encoding Rules (DER) has been discovered in libtasn1, potentially resulting in the execution of arbitrary code.
Background
Libtasn1 is a library used to parse ASN.1 (Abstract Syntax Notation One) objects, and perform DER (Distinguished Encoding Rules) decoding. Libtasn1 is included with the GNU TLS library, which is used by applications to provide a cryptographically secure communications channel.
Affected Packages
Package: dev-libs/libtasn1
Vulnerable: < 0.2.18
Unaffected: >= 0.2.18
Architectures: All supported architectures
Package: net-libs/gnutls
Vulnerable: < 1.2.10
Unaffected: >= 1.2.10
Architectures: All supported architectures
Description
Evgeny Legerov has reported a flaw in the DER decoding routines provided by libtasn1, which could cause an out of bounds access to occur.
Impact
A remote attacker could cause an application using libtasn1 to crash and potentially execute arbitrary code by sending specially crafted input.
Workaround
There is no known workaround at this time.
Resolution
All libtasn1 users should upgrade to the latest version: Code: | # emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/libtasn1-0.2.18" | All GNU TLS users should upgrade to the latest version: Code: | # emerge --sync
# emerge --ask --oneshot --verbose ">=net-libs/gnutls-1.2.10" |
References
CVE-2006-0645
Last edited by GLSA on Sat Feb 16, 2008 4:17 am; edited 3 times in total |
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