Evgeny Legerov discovered that zlib incorrectly handled memory when performing certain inflate operations. An attacker could use this issue to cause zlib to crash, resulting in a denial of service, or possibly execute arbitrary code.
1:1.2.11.dfsg-0ubuntu2.21:1.2.8.dfsg-1ubuntu1.1+esm21:1.2.8.dfsg-2ubuntu4.3+esm2