Debian Security Advisory 1333-1 – It has been discovered that the GnuTLS certificate verification methods implemented in libcurl-gnutls, a solid, usable, and portable multi-protocol file transfer library, did not check for expired or invalid dates.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/57846/dsa-1333-1.txt
Source: https://packetstormsecurity.com/files/57846/Debian-Linux-Security-Advisory-1333-1.html