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FreeBSD : gnutls -- certificate chain verification DoS (84ab58cf-e4ac-11d8-9b0a-000347a4fa7d)

high Nessus Plugin ID 37047

Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

Patric Hornik reports on a problem in the certificate chain verification procedures of GnuTLS that may result in a denial-of-service vulnerability :

The certificate chain should be verified from last root certificate to the first certificate. Otherwise a lot of unauthorized CPU processing can be forced to check certificate signatures signed with arbitrary RSA/DSA keys chosen by attacker.

In GnuTLS the signatures are checked from first to last certificate, there is no limit on size of keys and no limit on length of certificate chain.

Solution

Update the affected packages.

See Also

http://www.hornik.sk/SA/SA-20040802.txt

http://www.nessus.org/u?f1463021

Plugin Details

Severity: High

ID: 37047

File Name: freebsd_pkg_84ab58cfe4ac11d89b0a000347a4fa7d.nasl

Version: 1.13

Type: local

Published: 4/23/2009

Updated: 1/6/2021

Supported Sensors: Nessus

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:gnutls, p-cpe:/a:freebsd:freebsd:gnutls-devel, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Patch Publication Date: 10/5/2004

Vulnerability Publication Date: 8/2/2004

Reference Information

Secunia: 12156