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Ubuntu Security Notice USN-6824-1
June 10, 2024

giflib vulnerabilities

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

• Ubuntu 23.10
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS
• Ubuntu 18.04 LTS
• Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in giflib.

Software Description:

• giflib: library for GIF images (utilities)

Details:

It was discovered that GIFLIB incorrectly handled certain GIF files.
An attacker could possibly use this issue to cause a denial of service.
(CVE-2021-40633, CVE-2022-28506, CVE-2023-39742)

Update instructions:

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

Ubuntu 23.10
giflib-tools 5.2.1-2.5ubuntu0.1

Ubuntu 22.04 LTS
giflib-tools 5.1.9-2ubuntu0.1

Ubuntu 20.04 LTS
giflib-tools 5.1.9-1ubuntu0.1

Ubuntu 18.04 LTS
giflib-tools 5.1.4-2ubuntu0.1+esm1
Available with Ubuntu Pro

Ubuntu 16.04 LTS
giflib-tools 5.1.4-0.3~16.04.1+esm1
Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-6824-1
CVE-2021-40633, CVE-2022-28506, CVE-2023-39742

Package Information:
https://launchpad.net/ubuntu/+source/giflib/5.2.1-2.5ubuntu0.1
https://launchpad.net/ubuntu/+source/giflib/5.1.9-2ubuntu0.1
https://launchpad.net/ubuntu/+source/giflib/5.1.9-1ubuntu0.1