==========================================================================
Ubuntu Security Notice USN-6369-1
September 14, 2023

libwebp vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 23.04
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

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

Software Description:
- libwebp: Lossy compression of digital photographic images

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 code.

Update instructions:

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

Ubuntu 23.04:
   libwebp7                        1.2.4-0.1ubuntu0.23.04.2
   libwebpdemux2                   1.2.4-0.1ubuntu0.23.04.2
   libwebpmux3                     1.2.4-0.1ubuntu0.23.04.2

Ubuntu 22.04 LTS:
   libwebp7                        1.2.2-2ubuntu0.22.04.2
   libwebpdemux2                   1.2.2-2ubuntu0.22.04.2
   libwebpmux3                     1.2.2-2ubuntu0.22.04.2

Ubuntu 20.04 LTS:
   libwebp6                        0.6.1-2ubuntu0.20.04.3
   libwebpdemux2                   0.6.1-2ubuntu0.20.04.3
   libwebpmux3                     0.6.1-2ubuntu0.20.04.3

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

References:
   https://ubuntu.com/security/notices/USN-6369-1
   CVE-2023-4863

Package Information:
   https://launchpad.net/ubuntu/+source/libwebp/1.2.4-0.1ubuntu0.23.04.2
   https://launchpad.net/ubuntu/+source/libwebp/1.2.2-2ubuntu0.22.04.2
   https://launchpad.net/ubuntu/+source/libwebp/0.6.1-2ubuntu0.20.04.3