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Ubuntu Security Notice USN-4897-2

Ubuntu Security Notice USN-4897-2
Posted Aug 14, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4897-2 - USN-4897-1 fixed several vulnerabilities in Pygments. This update provides the corresponding update for Ubuntu 14.04 LTS. Ben Caller discovered that Pygments incorrectly handled parsing certain files. If a user or automated system were tricked into parsing a specially crafted file, a remote attacker could cause Pygments to hang or consume resources, resulting in a denial of service.

tags | advisory, remote, denial of service, vulnerability
systems | linux, ubuntu
advisories | CVE-2021-20270, CVE-2021-27291
SHA-256 | 0229f770d8874a0513c2166bf3e303d5654a0a18244de156ea9264cde333f0cd

Ubuntu Security Notice USN-4897-2

Change Mirror Download
=========================================================================
Ubuntu Security Notice USN-4897-2
August 14, 2023

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

- Ubuntu 14.04 LTS (Available with Ubuntu Pro)

Summary:

Pygments could be made to hang if it opened a specially crafted file.

Software Description:
- pygments: Generic syntax highlighter

Details:

USN-4897-1 fixed several vulnerabilities in Pygments. This update provides
the corresponding update for Ubuntu 14.04 LTS.

Original advisory details:

Ben Caller discovered that Pygments incorrectly handled parsing certain
files. If a user or automated system were tricked into parsing a specially
crafted file, a remote attacker could cause Pygments to hang or consume
resources, resulting in a denial of service. (CVE-2021-27291)

It was discovered that Pygments incorrectly handled parsing certain
files. An attacker could possibly use this issue to cause a denial of
service. (CVE-2021-20270)

Update instructions:

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

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
python-pygments 1.6+dfsg-1ubuntu1.1+esm1
python3-pygments 1.6+dfsg-1ubuntu1.1+esm1

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

References:
https://ubuntu.com/security/notices/USN-4897-2
https://ubuntu.com/security/notices/USN-4897-1
CVE-2021-20270, CVE-2021-27291
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