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Ubuntu Security Notice USN-4885-1

Ubuntu Security Notice USN-4885-1
Posted Mar 22, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4885-1 - It was discovered that Pygments incorrectly handled parsing SML files. If a user or automated system were tricked into parsing a specially crafted SML file, a remote attacker could cause Pygments to hang, resulting in a denial of service.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2021-20270
MD5 | a3a85071b4f559e38a297f2f2c2cd26b

Ubuntu Security Notice USN-4885-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-4885-1
March 22, 2021

pygments vulnerability
==========================================================================

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

- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

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

Software Description:
- pygments: Generic syntax highlighter

Details:

It was discovered that Pygments incorrectly handled parsing SML files. If a
user or automated system were tricked into parsing a specially crafted SML
file, a remote attacker could cause Pygments to hang, resulting in a denial
of service.

Update instructions:

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

Ubuntu 20.10:
python3-pygments 2.3.1+dfsg-4ubuntu0.1

Ubuntu 20.04 LTS:
python-pygments 2.3.1+dfsg-1ubuntu2.1
python3-pygments 2.3.1+dfsg-1ubuntu2.1

Ubuntu 18.04 LTS:
python-pygments 2.2.0+dfsg-1ubuntu0.1
python3-pygments 2.2.0+dfsg-1ubuntu0.1

Ubuntu 16.04 LTS:
python-pygments 2.1+dfsg-1ubuntu0.1
python3-pygments 2.1+dfsg-1ubuntu0.1

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

References:
https://ubuntu.com/security/notices/USN-4885-1
CVE-2021-20270

Package Information:
https://launchpad.net/ubuntu/+source/pygments/2.3.1+dfsg-4ubuntu0.1
https://launchpad.net/ubuntu/+source/pygments/2.3.1+dfsg-1ubuntu2.1
https://launchpad.net/ubuntu/+source/pygments/2.2.0+dfsg-1ubuntu0.1
https://launchpad.net/ubuntu/+source/pygments/2.1+dfsg-1ubuntu0.1
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