Debian DSA-1719-1 : gnutls13 - design flaw

Medium Nessus Plugin ID 35637

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VPR Score: 4.0


The remote Debian host is missing a security-related update.


Martin von Gagern discovered that GNUTLS, an implementation of the TLS/SSL protocol, handles verification of X.509 certificate chains incorrectly if a self-signed certificate is configured as a trusted certificate. This could cause clients to accept forged server certificates as genuine. (CVE-2008-4989 )

In addition, this update tightens the checks for X.509v1 certificates which causes GNUTLS to reject certain certificate chains it accepted before. (In certificate chain processing, GNUTLS does not recognize X.509v1 certificates as valid unless explicitly requested by the application.)


Upgrade the gnutls13 packages.

For the stable distribution (etch), this problem has been fixed in version 1.4.4-3+etch3.

See Also

Plugin Details

Severity: Medium

ID: 35637

File Name: debian_DSA-1719.nasl

Version: 1.11

Type: local

Agent: unix

Published: 2009/02/12

Updated: 2019/08/02

Dependencies: 12634

Risk Information

Risk Factor: Medium

VPR Score: 4.0

CVSS v2.0

Base Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:gnutls13, cpe:/o:debian:debian_linux:4.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Patch Publication Date: 2009/02/10

Reference Information

CVE: CVE-2008-4989

DSA: 1719

CWE: 255