gsd-2021-33193
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
A crafted method sent through HTTP/2 will bypass validation and be forwarded by mod_proxy, which can lead to request splitting or cache poisoning. This issue affects Apache HTTP Server 2.4.17 to 2.4.48.
Aliases
Aliases
CVE-2021-33193


To clipboard 

{
   GSD: {
      alias: "CVE-2021-33193",
      description: "A crafted method sent through HTTP/2 will bypass validation and be forwarded by mod_proxy, which can lead to request splitting or cache poisoning. This issue affects Apache HTTP Server 2.4.17 to 2.4.48.",
      id: "GSD-2021-33193",
      references: [
         "https://www.suse.com/security/cve/CVE-2021-33193.html",
         "https://ubuntu.com/security/CVE-2021-33193",
         "https://advisories.mageia.org/CVE-2021-33193.html",
         "https://security.archlinux.org/CVE-2021-33193",
         "https://alas.aws.amazon.com/cve/html/CVE-2021-33193.html",
         "https://linux.oracle.com/cve/CVE-2021-33193.html",
         "https://access.redhat.com/errata/RHSA-2022:1915",
         "https://access.redhat.com/errata/RHSA-2022:6753",
         "https://access.redhat.com/errata/RHSA-2022:7143",
         "https://access.redhat.com/errata/RHSA-2022:7144",
      ],
   },
   gsd: {
      metadata: {
         exploitCode: "unknown",
         remediation: "unknown",
         reportConfidence: "confirmed",
         type: "vulnerability",
      },
      osvSchema: {
         aliases: [
            "CVE-2021-33193",
         ],
         details: "A crafted method sent through HTTP/2 will bypass validation and be forwarded by mod_proxy, which can lead to request splitting or cache poisoning. This issue affects Apache HTTP Server 2.4.17 to 2.4.48.",
         id: "GSD-2021-33193",
         modified: "2023-12-13T01:23:18.945226Z",
         schema_version: "1.4.0",
      },
   },
   namespaces: {
      "cve.org": {
         CVE_data_meta: {
            ASSIGNER: "security@apache.org",
            ID: "CVE-2021-33193",
            STATE: "PUBLIC",
            TITLE: "Request splitting via HTTP/2 method injection and mod_proxy",
         },
         affects: {
            vendor: {
               vendor_data: [
                  {
                     product: {
                        product_data: [
                           {
                              product_name: "Apache HTTP Server",
                              version: {
                                 version_data: [
                                    {
                                       version_name: "Apache HTTP Server 2.4",
                                       version_value: "2.4.17 to 2.4.48",
                                    },
                                 ],
                              },
                           },
                        ],
                     },
                     vendor_name: "Apache Software Foundation",
                  },
               ],
            },
         },
         credit: [
            {
               lang: "eng",
               value: "Reported by James Kettle of PortSwigger",
            },
         ],
         data_format: "MITRE",
         data_type: "CVE",
         data_version: "4.0",
         description: {
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               },
            ],
         },
         generator: {
            engine: "Vulnogram 0.0.9",
         },
         impact: [
            {
               other: "moderate",
            },
         ],
         problemtype: {
            problemtype_data: [
               {
                  description: [
                     {
                        lang: "eng",
                        value: "Request Splitting",
                     },
                  ],
               },
            ],
         },
         references: {
            reference_data: [
               {
                  name: "https://portswigger.net/research/http2",
                  refsource: "MISC",
                  url: "https://portswigger.net/research/http2",
               },
               {
                  name: "https://github.com/apache/httpd/commit/ecebcc035ccd8d0e2984fe41420d9e944f456b3c.patch",
                  refsource: "MISC",
                  url: "https://github.com/apache/httpd/commit/ecebcc035ccd8d0e2984fe41420d9e944f456b3c.patch",
               },
               {
                  name: "[httpd-cvs] 20210916 [httpd-site] branch main updated: Revert \"Add descriptions for CVE-2021-33193 CVE-2021-36160\"",
                  refsource: "MLIST",
                  url: "https://lists.apache.org/thread.html/re4162adc051c1a0a79e7a24093f3776373e8733abaff57253fef341d@%3Ccvs.httpd.apache.org%3E",
               },
               {
                  name: "[httpd-cvs] 20210916 [httpd-site] branch main updated: Add descriptions for CVE-2021-33193 CVE-2021-36160",
                  refsource: "MLIST",
                  url: "https://lists.apache.org/thread.html/ree7519d71415ecdd170ff1889cab552d71758d2ba2904a17ded21a70@%3Ccvs.httpd.apache.org%3E",
               },
               {
                  name: "FEDORA-2021-5d2d4b6ac5",
                  refsource: "FEDORA",
                  url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DSM6UWQICBJ2TU727RENU3HBKEAFLT6T/",
               },
               {
                  name: "FEDORA-2021-f94985afca",
                  refsource: "FEDORA",
                  url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EUVJVRJRBW5QVX4OY3NOHZDQ3B3YOTSG/",
               },
               {
                  name: "20211124 Multiple Vulnerabilities in Apache HTTP Server Affecting Cisco Products: November 2021",
                  refsource: "CISCO",
                  url: "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-2.4.49-VWL69sWQ",
               },
               {
                  name: "https://www.oracle.com/security-alerts/cpujan2022.html",
                  refsource: "MISC",
                  url: "https://www.oracle.com/security-alerts/cpujan2022.html",
               },
               {
                  name: "https://security.netapp.com/advisory/ntap-20210917-0004/",
                  refsource: "CONFIRM",
                  url: "https://security.netapp.com/advisory/ntap-20210917-0004/",
               },
               {
                  name: "https://www.tenable.com/security/tns-2021-17",
                  refsource: "CONFIRM",
                  url: "https://www.tenable.com/security/tns-2021-17",
               },
               {
                  name: "https://www.oracle.com/security-alerts/cpuapr2022.html",
                  refsource: "MISC",
                  url: "https://www.oracle.com/security-alerts/cpuapr2022.html",
               },
               {
                  name: "GLSA-202208-20",
                  refsource: "GENTOO",
                  url: "https://security.gentoo.org/glsa/202208-20",
               },
               {
                  name: "[debian-lts-announce] 20230303 [SECURITY] [DLA 3351-1] apache2 security update",
                  refsource: "MLIST",
                  url: "https://lists.debian.org/debian-lts-announce/2023/03/msg00002.html",
               },
            ],
         },
         source: {
            discovery: "UNKNOWN",
         },
         timeline: [
            {
               lang: "eng",
               time: "2021-05-11",
               value: "reported",
            },
            {
               lang: "eng",
               time: "2021-08-06",
               value: "public",
            },
         ],
      },
      "nvd.nist.gov": {
         configurations: {
            CVE_data_version: "4.0",
            nodes: [
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*",
                        cpe_name: [],
                        versionEndIncluding: "2.4.48",
                        versionStartIncluding: "2.4.17",
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:a:tenable:tenable.sc:*:*:*:*:*:*:*:*",
                        cpe_name: [],
                        versionEndIncluding: "5.19.1",
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:a:oracle:secure_backup:*:*:*:*:*:*:*:*",
                        cpe_name: [],
                        versionEndExcluding: "18.1.0.1.0",
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
            ],
         },
         cve: {
            CVE_data_meta: {
               ASSIGNER: "security@apache.org",
               ID: "CVE-2021-33193",
            },
            data_format: "MITRE",
            data_type: "CVE",
            data_version: "4.0",
            description: {
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                  },
               ],
            },
            problemtype: {
               problemtype_data: [
                  {
                     description: [
                        {
                           lang: "en",
                           value: "NVD-CWE-Other",
                        },
                     ],
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            },
            references: {
               reference_data: [
                  {
                     name: "https://portswigger.net/research/http2",
                     refsource: "MISC",
                     tags: [
                        "Exploit",
                        "Third Party Advisory",
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                     url: "https://portswigger.net/research/http2",
                  },
                  {
                     name: "https://github.com/apache/httpd/commit/ecebcc035ccd8d0e2984fe41420d9e944f456b3c.patch",
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                  },
                  {
                     name: "[httpd-cvs] 20210916 [httpd-site] branch main updated: Add descriptions for CVE-2021-33193 CVE-2021-36160",
                     refsource: "MLIST",
                     tags: [
                        "Mailing List",
                        "Patch",
                        "Vendor Advisory",
                     ],
                     url: "https://lists.apache.org/thread.html/ree7519d71415ecdd170ff1889cab552d71758d2ba2904a17ded21a70@%3Ccvs.httpd.apache.org%3E",
                  },
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                     name: "[httpd-cvs] 20210916 [httpd-site] branch main updated: Revert \"Add descriptions for CVE-2021-33193 CVE-2021-36160\"",
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                  },
                  {
                     name: "https://www.tenable.com/security/tns-2021-17",
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                     tags: [
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                     tags: [
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                     url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EUVJVRJRBW5QVX4OY3NOHZDQ3B3YOTSG/",
                  },
                  {
                     name: "20211124 Multiple Vulnerabilities in Apache HTTP Server Affecting Cisco Products: November 2021",
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                  },
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                     refsource: "GENTOO",
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                     url: "https://security.gentoo.org/glsa/202208-20",
                  },
                  {
                     name: "[debian-lts-announce] 20230303 [SECURITY] [DLA 3351-1] apache2 security update",
                     refsource: "MLIST",
                     tags: [],
                     url: "https://lists.debian.org/debian-lts-announce/2023/03/msg00002.html",
                  },
               ],
            },
         },
         impact: {
            baseMetricV2: {
               acInsufInfo: false,
               cvssV2: {
                  accessComplexity: "LOW",
                  accessVector: "NETWORK",
                  authentication: "NONE",
                  availabilityImpact: "NONE",
                  baseScore: 5,
                  confidentialityImpact: "NONE",
                  integrityImpact: "PARTIAL",
                  vectorString: "AV:N/AC:L/Au:N/C:N/I:P/A:N",
                  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: "NONE",
                  baseScore: 7.5,
                  baseSeverity: "HIGH",
                  confidentialityImpact: "NONE",
                  integrityImpact: "HIGH",
                  privilegesRequired: "NONE",
                  scope: "UNCHANGED",
                  userInteraction: "NONE",
                  vectorString: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
                  version: "3.1",
               },
               exploitabilityScore: 3.9,
               impactScore: 3.6,
            },
         },
         lastModifiedDate: "2023-03-03T19:15Z",
         publishedDate: "2021-08-16T08:15Z",
      },
   },
}


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