gsd-2021-27291
Vulnerability from gsd
Modified
2023-12-13 01:23
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.
Aliases
Aliases
CVE-2021-27291


To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-27291",
    "description": "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": "GSD-2021-27291",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-27291.html",
      "https://www.debian.org/security/2021/dsa-4889",
      "https://www.debian.org/security/2021/dsa-4878",
      "https://access.redhat.com/errata/RHSA-2021:4151",
      "https://access.redhat.com/errata/RHSA-2021:4150",
      "https://access.redhat.com/errata/RHSA-2021:4139",
      "https://access.redhat.com/errata/RHSA-2021:3252",
      "https://access.redhat.com/errata/RHSA-2021:0781",
      "https://ubuntu.com/security/CVE-2021-27291",
      "https://advisories.mageia.org/CVE-2021-27291.html",
      "https://security.archlinux.org/CVE-2021-27291",
      "https://linux.oracle.com/cve/CVE-2021-27291.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-27291"
      ],
      "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": "GSD-2021-27291",
      "modified": "2023-12-13T01:23:35.936826Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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      "CVE_data_meta": {
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        "ID": "CVE-2021-27291",
        "STATE": "PUBLIC"
      },
      "affects": {
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          "vendor_data": [
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              "product": {
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                    "version": {
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                          "version_value": "n/a"
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          }
        ]
      },
      "problemtype": {
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                "lang": "eng",
                "value": "n/a"
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      },
      "references": {
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            "refsource": "MISC",
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          },
          {
            "name": "https://github.com/pygments/pygments/commit/2e7e8c4a7b318f4032493773732754e418279a14",
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            "url": "https://github.com/pygments/pygments/commit/2e7e8c4a7b318f4032493773732754e418279a14"
          },
          {
            "name": "[debian-lts-announce] 20210319 [SECURITY] [DLA 2600-1] pygments security update",
            "refsource": "MLIST",
            "url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00024.html"
          },
          {
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            "url": "https://www.debian.org/security/2021/dsa-4889"
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          {
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          },
          {
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          },
          {
            "name": "FEDORA-2021-3f975f68c8",
            "refsource": "FEDORA",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WSLD67LFGXOX2K5YNESSWAS4AGZIJTUQ/"
          },
          {
            "name": "[debian-lts-announce] 20210506 [SECURITY] [DLA 2648-2] mediawiki regression update",
            "refsource": "MLIST",
            "url": "https://lists.debian.org/debian-lts-announce/2021/05/msg00006.html"
          }
        ]
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003e=1.1,\u003c2.7.4",
          "affected_versions": "All versions starting from 1.1 before 2.7.4",
          "cvss_v2": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "cwe_ids": [
            "CWE-1035",
            "CWE-1333",
            "CWE-937"
          ],
          "date": "2023-08-08",
          "description": "In pygments 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 is vulnerable to ReDoS. By crafting malicious input, an attacker can cause a denial of service.",
          "fixed_versions": [
            "2.7.4"
          ],
          "identifier": "CVE-2021-27291",
          "identifiers": [
            "CVE-2021-27291"
          ],
          "not_impacted": "All versions before 1.1, all versions starting from 2.7.4",
          "package_slug": "pypi/Pygments",
          "pubdate": "2021-03-17",
          "solution": "Upgrade to version 2.7.4 or above.",
          "title": "Uncontrolled Resource Consumption",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-27291"
          ],
          "uuid": "ae31c2cb-26c5-4e6f-85db-15c6982e4e17"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
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                "cpe23Uri": "cpe:2.3:a:pygments:pygments:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "2.7.4",
                "versionStartIncluding": "1.1",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
                "cpe_name": [],
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              },
              {
                "cpe23Uri": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
                "cpe_name": [],
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            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
                "cpe_name": [],
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            ],
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        ]
      },
      "cve": {
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        "description": {
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            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
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                {
                  "lang": "en",
                  "value": "NVD-CWE-Other"
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              "name": "https://github.com/pygments/pygments/commit/2e7e8c4a7b318f4032493773732754e418279a14",
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      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 5.0,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 10.0,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2022-05-23T22:35Z",
      "publishedDate": "2021-03-17T13:15Z"
    }
  }
}


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