CVE-2021-20270

Description

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

Link	Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1922136	issue tracking third party advisory patch
https://www.debian.org/security/2021/dsa-4889	third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2021/05/msg00003.html	third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2021/05/msg00006.html	third party advisory mailing list
https://www.oracle.com/security-alerts/cpuoct2021.html	third party advisory not applicable

Frequently Asked Questions

What is the severity of CVE-2021-20270?: CVE-2021-20270 has been scored as a high severity vulnerability.
How to fix CVE-2021-20270?: To fix CVE-2021-20270, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-20270 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-20270 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-20270?: CVE-2021-20270 affects n/a python-pygments.

This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.

Description

Category

CWE-835 – Loop with Unreachable Exit Condition ('Infinite Loop')

References

Frequently Asked Questions