CVE-2021-20270: Infinite Loop in Pygments
(updated )
An infinite loop in SMLLexer in Pygments versions 1.5 to 2.7.3 may lead to denial of service when performing syntax highlighting of a Standard ML (SML) source file, as demonstrated by input that only contains the “exception” keyword.
References
- bugzilla.redhat.com/show_bug.cgi?id=1922136
- github.com/advisories/GHSA-9w8r-397f-prfh
- github.com/pygments/pygments
- github.com/pygments/pygments/commit/f91804ff4772e3ab41f46e28d370f57898700333
- github.com/pypa/advisory-database/tree/main/vulns/pygments/PYSEC-2021-140.yaml
- lists.debian.org/debian-lts-announce/2021/05/msg00003.html
- lists.debian.org/debian-lts-announce/2021/05/msg00006.html
- nvd.nist.gov/vuln/detail/CVE-2021-20270
- www.debian.org/security/2021/dsa-4889
- www.oracle.com/security-alerts/cpuoct2021.html
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