pysec-2021-140
Vulnerability from pysec
Published
2021-03-23 17:15
Modified
2021-08-27 03:22
Details

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.

Impacted products
Name purl
pygments pkg:pypi/pygments
Aliases


To clipboard 

{
   affected: [
      {
         package: {
            ecosystem: "PyPI",
            name: "pygments",
            purl: "pkg:pypi/pygments",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "1.5",
                  },
                  {
                     fixed: "2.7.4",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
         versions: [
            "1.5",
            "1.6",
            "1.6rc1",
            "2.0",
            "2.0.1",
            "2.0.2",
            "2.0rc1",
            "2.1",
            "2.1.1",
            "2.1.2",
            "2.1.3",
            "2.2.0",
            "2.3.0",
            "2.3.1",
            "2.4.0",
            "2.4.1",
            "2.4.2",
            "2.5.1",
            "2.5.2",
            "2.6.0",
            "2.6.1",
            "2.7.0",
            "2.7.1",
            "2.7.2",
            "2.7.3",
         ],
      },
   ],
   aliases: [
      "CVE-2021-20270",
      "GHSA-9w8r-397f-prfh",
   ],
   details: "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.",
   id: "PYSEC-2021-140",
   modified: "2021-08-27T03:22:17.263376Z",
   published: "2021-03-23T17:15:00Z",
   references: [
      {
         type: "REPORT",
         url: "https://bugzilla.redhat.com/show_bug.cgi?id=1922136",
      },
      {
         type: "ADVISORY",
         url: "https://www.debian.org/security/2021/dsa-4889",
      },
      {
         type: "WEB",
         url: "https://lists.debian.org/debian-lts-announce/2021/05/msg00003.html",
      },
      {
         type: "WEB",
         url: "https://lists.debian.org/debian-lts-announce/2021/05/msg00006.html",
      },
      {
         type: "ADVISORY",
         url: "https://github.com/advisories/GHSA-9w8r-397f-prfh",
      },
   ],
}


Log in or create an account to share your comment.

Security Advisory comment format.

This schema specifies the format of a comment related to a security advisory.

UUIDv4 of the comment
UUIDv4 of the Vulnerability-Lookup instance
When the comment was created originally
When the comment was last updated
Title of the comment
Description of the comment
The identifier of the vulnerability (CVE ID, GHSA-ID, PYSEC ID, etc.).



Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.