pysec-2021-141
Vulnerability from pysec
Published
2021-03-17 13:15
Modified
2021-08-27 03:22
Details

In pygments 1.1+, fixed in 2.7.4, the lexers used to parse programming languages rely heavily on regular expressions. Some of the regular expressions have exponential or cubic worst-case complexity and are vulnerable to ReDoS. By crafting malicious input, an attacker can cause a denial of service.

Impacted products
Name purl
pygments pkg:pypi/pygments
Aliases


To clipboard 

{
   affected: [
      {
         package: {
            ecosystem: "PyPI",
            name: "pygments",
            purl: "pkg:pypi/pygments",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "0",
                  },
                  {
                     fixed: "2e7e8c4a7b318f4032493773732754e418279a14",
                  },
               ],
               repo: "https://github.com/pygments/pygments",
               type: "GIT",
            },
            {
               events: [
                  {
                     introduced: "1.1",
                  },
                  {
                     fixed: "2.7.4",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
         versions: [
            "1.1",
            "1.1.1",
            "1.2",
            "1.2.1",
            "1.2.2",
            "1.3",
            "1.3.1",
            "1.4",
            "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-2021-27291",
      "GHSA-pq64-v7f5-gqh8",
   ],
   details: "In pygments 1.1+, fixed in 2.7.4, the lexers used to parse programming languages rely heavily on regular expressions. Some of the regular expressions have exponential or cubic worst-case complexity and are vulnerable to ReDoS. By crafting malicious input, an attacker can cause a denial of service.",
   id: "PYSEC-2021-141",
   modified: "2021-08-27T03:22:17.331175Z",
   published: "2021-03-17T13:15:00Z",
   references: [
      {
         type: "WEB",
         url: "https://gist.github.com/b-c-ds/b1a2cc0c68a35c57188575eb496de5ce",
      },
      {
         type: "FIX",
         url: "https://github.com/pygments/pygments/commit/2e7e8c4a7b318f4032493773732754e418279a14",
      },
      {
         type: "WEB",
         url: "https://lists.debian.org/debian-lts-announce/2021/03/msg00024.html",
      },
      {
         type: "ADVISORY",
         url: "https://www.debian.org/security/2021/dsa-4878",
      },
      {
         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.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WSLD67LFGXOX2K5YNESSWAS4AGZIJTUQ/",
      },
      {
         type: "WEB",
         url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GSJRFHALQ7E3UV4FFMFU2YQ6LUDHAI55/",
      },
      {
         type: "WEB",
         url: "https://lists.debian.org/debian-lts-announce/2021/05/msg00006.html",
      },
      {
         type: "ADVISORY",
         url: "https://github.com/advisories/GHSA-pq64-v7f5-gqh8",
      },
   ],
}


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