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AUSCERT External Security Bulletin Redistribution
ESB-2021.0988
USN-4885-1: Pygments vulnerability
23 March 2021
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AusCERT Security Bulletin Summary
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Product: Pygments
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-20270
Reference: ESB-2021.0903
Original Bulletin:
https://ubuntu.com/security/notices/USN-4885-1
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USN-4885-1: Pygments vulnerability
22 March 2021
pygments could be made to hang if it opened a specially crafted file.
Releases
o Ubuntu 20.10
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Packages
o 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
o python3-pygments - 2.3.1+dfsg-4ubuntu0.1
Ubuntu 20.04
o python3-pygments - 2.3.1+dfsg-1ubuntu2.1
o python-pygments - 2.3.1+dfsg-1ubuntu2.1
Ubuntu 18.04
o python3-pygments - 2.2.0+dfsg-1ubuntu0.1
o python-pygments - 2.2.0+dfsg-1ubuntu0.1
Ubuntu 16.04
o python3-pygments - 2.1+dfsg-1ubuntu0.1
o python-pygments - 2.1+dfsg-1ubuntu0.1
In general, a standard system update will make all the necessary changes.
References
o CVE-2021-20270
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