SixLabors ImageSharp Has Infinite Loop in GIF Decoder When Skipping Malformed Comment Extension Blocks

链接： https://github.com/advisories/GHSA-rxmq-m78w-7wmc

仓库 Star： 7761

CVSS 评分： 5.3

参考链接：

• https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-rxmq-m78w-7wmc

• https://github.com/SixLabors/ImageSharp/issues/2953

• https://github.com/SixLabors/ImageSharp/commit/55e49262df9a057dff9b7807ed1b7bdb49187c3f

• https://github.com/SixLabors/ImageSharp/commit/833f3ceec35af6b775950e06f03b934546cefbf6

• https://github.com/advisories/GHSA-rxmq-m78w-7wmc

描述：

Impact

A specially crafted GIF file containing a malformed comment extension block (with a missing block terminator) can cause the ImageSharp GIF decoder to enter an infinite loop while attempting to skip the block. This leads to a denial of service. Applications processing untrusted GIF input should upgrade to a patched version.

Patches

The problem has been patched. All users are advised to upgrade to v3.1.11 or v2.1.11.

Workarounds

None.