Debian Linux Security Advisory 3924-1 - A denial of service vulnerability was discovered in Varnish, a state of the art, high-performance web accelerator. Specially crafted HTTP requests can cause the Varnish daemon to assert and restart, clearing the cache in the process.
eec3cab8691cf6819a0aac4586493b8442045b55c36e9f107e124a9ffa6c91cf