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USN-4971-1: libwebp vulnerabilities

1 June 2021

libwebp could be made to crash or run programs as your login if it opened a specially crafted file.



  • libwebp - Lossy compression of digital photographic images.


It was discovered that libwebp incorrectly handled certain malformed
images. If a user or automated system were tricked into opening a specially
crafted image file, a remote attacker could use this issue to cause libwebp
to crash, resulting in a denial of service, or possibly execute arbitrary

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 21.04
Ubuntu 20.10
Ubuntu 20.04
Ubuntu 18.04

In general, a standard system update will make all the necessary changes.

Related notices

  • USN-4971-2: libwebpdemux1, libwebp, libwebp5, webp, libwebp-dev, libwebpmux1