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USN-4971-2: libwebp vulnerabilities

10 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.


USN-4971-1 fixed several vulnerabilities in libwebp. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

Original advisory details:

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 16.04
Ubuntu 14.04

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

Related notices

  • USN-4971-1: libwebpmux3, webp, libwebp6, libwebp, libwebp-dev, libwebpdemux2