It was discovered that GnuTLS, a library implementing the TLS and SSL protocols, incorrectly validates the first byte of padding in CBC modes. A remote attacker can possibly take advantage of this flaw to perform a padding oracle attack. For the oldstable distribution (wheezy), this problem has been fixed in version 2.12.20-8+deb7u4. We recommend that you upgrade your gnutls26 packages.
It was discovered that GnuTLS, a library implementing the TLS and SSL protocols, incorrectly validates the first byte of padding in CBC modes. A remote attacker can possibly take advantage of this flaw to perform a padding oracle attack.
For the oldstable distribution (wheezy), this problem has been fixed in version 2.12.20-8+deb7u4.
We recommend that you upgrade your gnutls26 packages.