gsd-2021-20270
Vulnerability from gsd
Modified
2023-12-13 01:23
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.
Aliases
Aliases
CVE-2021-20270


To clipboard 

{
   GSD: {
      alias: "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.",
      id: "GSD-2021-20270",
      references: [
         "https://www.suse.com/security/cve/CVE-2021-20270.html",
         "https://www.debian.org/security/2021/dsa-4889",
         "https://www.debian.org/security/2021/dsa-4870",
         "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-2021-20270",
         "https://advisories.mageia.org/CVE-2021-20270.html",
         "https://security.archlinux.org/CVE-2021-20270",
         "https://linux.oracle.com/cve/CVE-2021-20270.html",
      ],
   },
   gsd: {
      metadata: {
         exploitCode: "unknown",
         remediation: "unknown",
         reportConfidence: "confirmed",
         type: "vulnerability",
      },
      osvSchema: {
         aliases: [
            "CVE-2021-20270",
         ],
         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: "GSD-2021-20270",
         modified: "2023-12-13T01:23:12.024924Z",
         schema_version: "1.4.0",
      },
   },
   namespaces: {
      "cve.org": {
         CVE_data_meta: {
            ASSIGNER: "secalert@redhat.com",
            ID: "CVE-2021-20270",
            STATE: "PUBLIC",
         },
         affects: {
            vendor: {
               vendor_data: [
                  {
                     product: {
                        product_data: [
                           {
                              product_name: "python-pygments",
                              version: {
                                 version_data: [
                                    {
                                       version_value: "python-pygments 2.7.4",
                                    },
                                 ],
                              },
                           },
                        ],
                     },
                     vendor_name: "n/a",
                  },
               ],
            },
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         data_version: "4.0",
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                  value: "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.",
               },
            ],
         },
         problemtype: {
            problemtype_data: [
               {
                  description: [
                     {
                        lang: "eng",
                        value: "CWE-835",
                     },
                  ],
               },
            ],
         },
         references: {
            reference_data: [
               {
                  name: "https://bugzilla.redhat.com/show_bug.cgi?id=1922136",
                  refsource: "MISC",
                  url: "https://bugzilla.redhat.com/show_bug.cgi?id=1922136",
               },
               {
                  name: "DSA-4889",
                  refsource: "DEBIAN",
                  url: "https://www.debian.org/security/2021/dsa-4889",
               },
               {
                  name: "[debian-lts-announce] 20210505 [SECURITY] [DLA 2648-1] mediawiki security update",
                  refsource: "MLIST",
                  url: "https://lists.debian.org/debian-lts-announce/2021/05/msg00003.html",
               },
               {
                  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",
               },
               {
                  name: "https://www.oracle.com/security-alerts/cpuoct2021.html",
                  refsource: "MISC",
                  url: "https://www.oracle.com/security-alerts/cpuoct2021.html",
               },
            ],
         },
      },
      "gitlab.com": {
         advisories: [
            {
               affected_range: ">=1.5,<=2.7.3",
               affected_versions: "All versions starting from 1.5 up to 2.7.3",
               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-835",
                  "CWE-937",
               ],
               date: "2021-12-10",
               description: "An infinite loop in SMLLexer in Pygments to 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.",
               fixed_versions: [
                  "2.7.4",
               ],
               identifier: "CVE-2021-20270",
               identifiers: [
                  "CVE-2021-20270",
               ],
               not_impacted: "All versions before 1.5, all versions after 2.7.3",
               package_slug: "pypi/Pygments",
               pubdate: "2021-03-23",
               solution: "Upgrade to version 2.7.4 or above.",
               title: "Loop with Unreachable Exit Condition (Infinite Loop)",
               urls: [
                  "https://nvd.nist.gov/vuln/detail/CVE-2021-20270",
                  "https://bugzilla.redhat.com/show_bug.cgi?id=1922136",
               ],
               uuid: "b759e08d-078f-4f78-bb74-aba1d933cd4b",
            },
         ],
      },
      "nvd.nist.gov": {
         configurations: {
            CVE_data_version: "4.0",
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                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:a:pygments:pygments:*:*:*:*:*:*:*:*",
                        cpe_name: [],
                        versionEndIncluding: "2.7.3",
                        versionStartIncluding: "1.5",
                        vulnerable: true,
                     },
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                  operator: "OR",
               },
               {
                  children: [],
                  cpe_match: [
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                     },
                     {
                        cpe23Uri: "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
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                  operator: "OR",
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               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
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                  operator: "OR",
               },
               {
                  children: [],
                  cpe_match: [
                     {
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                        cpe_name: [],
                        vulnerable: true,
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                     {
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                        cpe_name: [],
                        vulnerable: true,
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                  operator: "OR",
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         cve: {
            CVE_data_meta: {
               ASSIGNER: "secalert@redhat.com",
               ID: "CVE-2021-20270",
            },
            data_format: "MITRE",
            data_type: "CVE",
            data_version: "4.0",
            description: {
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                  {
                     lang: "en",
                     value: "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.",
                  },
               ],
            },
            problemtype: {
               problemtype_data: [
                  {
                     description: [
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            references: {
               reference_data: [
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                     name: "https://bugzilla.redhat.com/show_bug.cgi?id=1922136",
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                     url: "https://bugzilla.redhat.com/show_bug.cgi?id=1922136",
                  },
                  {
                     name: "DSA-4889",
                     refsource: "DEBIAN",
                     tags: [
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                     url: "https://www.debian.org/security/2021/dsa-4889",
                  },
                  {
                     name: "[debian-lts-announce] 20210505 [SECURITY] [DLA 2648-1] mediawiki security update",
                     refsource: "MLIST",
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                  },
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                     name: "https://www.oracle.com/security-alerts/cpuoct2021.html",
                     refsource: "MISC",
                     tags: [
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                     ],
                     url: "https://www.oracle.com/security-alerts/cpuoct2021.html",
                  },
               ],
            },
         },
         impact: {
            baseMetricV2: {
               acInsufInfo: false,
               cvssV2: {
                  accessComplexity: "LOW",
                  accessVector: "NETWORK",
                  authentication: "NONE",
                  availabilityImpact: "PARTIAL",
                  baseScore: 5,
                  confidentialityImpact: "NONE",
                  integrityImpact: "NONE",
                  vectorString: "AV:N/AC:L/Au:N/C:N/I:N/A:P",
                  version: "2.0",
               },
               exploitabilityScore: 10,
               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: "2021-12-10T17:04Z",
         publishedDate: "2021-03-23T17:15Z",
      },
   },
}


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