GHSA-9w8r-397f-prfh
Vulnerability from github
Published
2021-04-20 16:35
Modified
2024-10-14 16:12
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.7 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Summary
Infinite Loop in Pygments
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.

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{
   affected: [
      {
         package: {
            ecosystem: "PyPI",
            name: "Pygments",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "1.5",
                  },
                  {
                     fixed: "2.7.4",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
      },
   ],
   aliases: [
      "CVE-2021-20270",
   ],
   database_specific: {
      cwe_ids: [
         "CWE-835",
      ],
      github_reviewed: true,
      github_reviewed_at: "2021-04-12T20:58:03Z",
      nvd_published_at: "2021-03-23T17:15:00Z",
      severity: "HIGH",
   },
   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: "GHSA-9w8r-397f-prfh",
   modified: "2024-10-14T16:12:14Z",
   published: "2021-04-20T16:35:47Z",
   references: [
      {
         type: "ADVISORY",
         url: "https://nvd.nist.gov/vuln/detail/CVE-2021-20270",
      },
      {
         type: "WEB",
         url: "https://github.com/pygments/pygments/commit/f91804ff4772e3ab41f46e28d370f57898700333",
      },
      {
         type: "WEB",
         url: "https://bugzilla.redhat.com/show_bug.cgi?id=1922136",
      },
      {
         type: "PACKAGE",
         url: "https://github.com/pygments/pygments",
      },
      {
         type: "WEB",
         url: "https://github.com/pypa/advisory-database/tree/main/vulns/pygments/PYSEC-2021-140.yaml",
      },
      {
         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: "WEB",
         url: "https://www.debian.org/security/2021/dsa-4889",
      },
      {
         type: "WEB",
         url: "https://www.oracle.com/security-alerts/cpuoct2021.html",
      },
   ],
   schema_version: "1.4.0",
   severity: [
      {
         score: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
         type: "CVSS_V3",
      },
      {
         score: "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
         type: "CVSS_V4",
      },
   ],
   summary: "Infinite Loop in Pygments",
}


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