Ubuntu Security Notice USN-4436-2

Ubuntu Security Notice 4436-2 - USN-4436-1 fixed a vulnerability in librsvg. The upstream fix caused a regression when parsing certain SVG files. This update backs out the fix pending further investigation. It was discovered that librsvg incorrectly handled parsing certain SVG files. A remote attacker could possibly use this issue to cause librsvg to crash, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS. It was discovered that librsvg incorrectly handled parsing certain SVG files with nested patterns. A remote attacker could possibly use this issue to cause librsvg to consume resources and crash, resulting in a denial of service. Various other issues were also addressed.