A libwebp security update has been released for Ubuntu Linux 20.04 LTS, 22.04 LTS, and 23.04.

[USN-6369-1] libwebp vulnerability

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

libwebp vulnerability
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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