GnuTLS: Denial of Service vulnerability

Background

GnuTLS is a free TLS 1.0 and SSL 3.0 implementation for the GNU project.

Description

A vulnerability has been discovered in the record packet parsing in the GnuTLS library. Additionally, a flaw was also found in the RSA key export functionality.

Impact

A remote attacker could exploit this vulnerability and cause a Denial of Service to any application that utilizes the GnuTLS library.

Workaround

There is no known workaround at this time.

Resolution

All GnuTLS users should remove the existing installation and upgrade to the latest version:

 # emerge --sync
 # emerge --unmerge gnutls
 # emerge --ask --oneshot --verbose net-libs/gnutls

Due to small API changes with the previous version, please do the following to ensure your applications are using the latest GnuTLS that you just emerged.

 # revdep-rebuild --soname-regexp libgnutls.so.1[0-1]

Previously exported RSA keys can be fixed by executing the following command on the key files:

 # certtool -k infile outfile