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Home >> Browse Vulnerability Assessment Database >> Ubuntu Local Security Checks >> USN251-1 : libtasn1-2 vulnerability

Vulnerability Assessment Details

USN251-1 : libtasn1-2 vulnerability

Vulnerability Assessment Summary
libtasn1-2 vulnerability

Detailed Explanation for this Vulnerability Assessment

Summary :

These remote packages are missing security patches :
- gnutls-bin
- libgnutls-doc
- libgnutls10
- libgnutls10-dev
- libgnutls11
- libgnutls11-dbg
- libgnutls11-dev
- libtasn1-2
- libtasn1-2-dev

Description :

Evgeny Legerov discovered a buffer overflow in the DER format decoding
function of the libtasn library. This library is mainly used by the
GNU TLS library
by sending a specially crafted X.509 certificate to a
server which uses TLS encryption/authentication, a remote attacker
could exploit this to crash that server process and possibly even
execute arbitrary code with the rights of that server.

In order to fix the vulnerability in libtasn, several internal
function signatures had to be changed
some of these functions are
used by the GNU TLS library, so that library needs to be updated as
well.

Solution :

Upgrade to :
- gnutls-bin-1.0.16-13.1ubuntu1.1 (Ubuntu 5.10)
- libgnutls-doc-1.0.4-3ubuntu1.2 (Ubuntu 4.10)
- libgnutls10-1.0.4-3ubuntu1.2 (Ubuntu 4.10)
- libgnutls10-dev-1.0.4-3ubuntu1.2 (Ubuntu 4.10)
- libgnutls11-1.0.16-13.1ubuntu1.1 (Ubuntu 5.10)
- libgnutls11-dbg-1.0.16-13.1ubuntu1.1 (Ubuntu 5.10)
- libgnutls11-dev-1.0.16-13.1ubuntu1.1 (Ubuntu 5.10)
- libtasn1-2-0.2.10-4ubuntu0.1 (Ubuntu 5.10)
- libtasn1-2-dev-0.2.10-4ubuntu0.1 (Ubuntu 5.10)

Network Security Threat Level: High

Networks Security ID:

Vulnerability Assessment Copyright: Ubuntu Security Notice (C) 2005 Canonical, Inc. / NASL script (C) 2005 Michel Arboi

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