OpenConnect, a VPN software, had a buffer overflow, causing a denial of service (application crash) or possibly unspecified other impact, via crafted certificate data to get_cert_name in gnutls.c.

For Debian 8 Jessie, this problem has been fixed in version 6.00-2+deb8u2.

We recommend that you upgrade your openconnect packages.

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS