A Libjpeg6b security update has been released for Ubuntu Linux 14.04 ESM.

USN-5497-1: Libjpeg6b vulnerabilities

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Ubuntu Security Notice USN-5497-1
June 30, 2022

libjpeg6b vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 ESM

Summary:

Several security issues were fixed in Libjpeg6b.

Software Description:
- libjpeg6b: library for handling JPEG files

Details:

It was discovered that Libjpeg6b was not properly performing bounds
checks when compressing PPM and Targa image files. An attacker could
possibly use this issue to cause a denial of service.
(CVE-2018-11212)

Chijin Zhou discovered that Libjpeg6b was incorrectly handling the
EOF character in input data when generating JPEG files. An attacker
could possibly use this issue to force the execution of a large loop,
force excessive memory consumption, and cause a denial of service.
(CVE-2018-11813)

Sheng Shu and Dongdong She discovered that Libjpeg6b was not properly
limiting the amount of memory being used when it was performing
decompression or multi-pass compression operations. An attacker could
possibly use this issue to force excessive memory consumption and
cause a denial of service. (CVE-2020-14152)

Update instructions:

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

Ubuntu 14.04 ESM:
libjpeg62 6b1-4ubuntu1+esm1

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

References:
https://ubuntu.com/security/notices/USN-5497-1
CVE-2018-11212, CVE-2018-11213, CVE-2018-11214, CVE-2018-11813,
CVE-2020-14152