cve-2021-43534
Vulnerability from cvelistv5
Published
2021-12-08 21:20
Modified
2024-08-04 03:55
Severity ?
EPSS score ?
1.58% (0.80559)
Summary
Mozilla developers and community members reported memory safety bugs present in Firefox 93 and Firefox ESR 91.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
References
security@mozilla.orghttps://bugzilla.mozilla.org/buglist.cgi?bug_id=1606864%2C1712671%2C1730048%2C1735152Broken Link, Issue Tracking, Vendor Advisory
security@mozilla.orghttps://lists.debian.org/debian-lts-announce/2021/12/msg00030.htmlMailing List, Third Party Advisory
security@mozilla.orghttps://lists.debian.org/debian-lts-announce/2022/01/msg00001.htmlMailing List, Third Party Advisory
security@mozilla.orghttps://www.debian.org/security/2021/dsa-5026Third Party Advisory
security@mozilla.orghttps://www.debian.org/security/2022/dsa-5034Issue Tracking, Third Party Advisory
security@mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2021-48/Vendor Advisory
security@mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2021-49/Vendor Advisory
security@mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2021-50/Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.mozilla.org/buglist.cgi?bug_id=1606864%2C1712671%2C1730048%2C1735152Broken Link, Issue Tracking, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2021/12/msg00030.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2022/01/msg00001.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2021/dsa-5026Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2022/dsa-5034Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.mozilla.org/security/advisories/mfsa2021-48/Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.mozilla.org/security/advisories/mfsa2021-49/Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.mozilla.org/security/advisories/mfsa2021-50/Vendor Advisory
Impacted products
Vendor Product Version
Mozilla Firefox Version: unspecified   < 94
 Create a notification for this product.
   Mozilla Thunderbird Version: unspecified   < 91.3
 Create a notification for this product.
   Mozilla Firefox ESR Version: unspecified   < 91.3
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
   containers: {
      adp: [
         {
            providerMetadata: {
               dateUpdated: "2024-08-04T03:55:29.303Z",
               orgId: "af854a3a-2127-422b-91ae-364da2661108",
               shortName: "CVE",
            },
            references: [
               {
                  tags: [
                     "x_refsource_MISC",
                     "x_transferred",
                  ],
                  url: "https://www.mozilla.org/security/advisories/mfsa2021-49/",
               },
               {
                  tags: [
                     "x_refsource_MISC",
                     "x_transferred",
                  ],
                  url: "https://www.mozilla.org/security/advisories/mfsa2021-50/",
               },
               {
                  tags: [
                     "x_refsource_MISC",
                     "x_transferred",
                  ],
                  url: "https://www.mozilla.org/security/advisories/mfsa2021-48/",
               },
               {
                  tags: [
                     "x_refsource_MISC",
                     "x_transferred",
                  ],
                  url: "https://bugzilla.mozilla.org/buglist.cgi?bug_id=1606864%2C1712671%2C1730048%2C1735152",
               },
               {
                  name: "DSA-5026",
                  tags: [
                     "vendor-advisory",
                     "x_refsource_DEBIAN",
                     "x_transferred",
                  ],
                  url: "https://www.debian.org/security/2021/dsa-5026",
               },
               {
                  name: "[debian-lts-announce] 20211229 [SECURITY] [DLA 2863-1] firefox-esr security update",
                  tags: [
                     "mailing-list",
                     "x_refsource_MLIST",
                     "x_transferred",
                  ],
                  url: "https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html",
               },
               {
                  name: "DSA-5034",
                  tags: [
                     "vendor-advisory",
                     "x_refsource_DEBIAN",
                     "x_transferred",
                  ],
                  url: "https://www.debian.org/security/2022/dsa-5034",
               },
               {
                  name: "[debian-lts-announce] 20220104 [SECURITY] [DLA 2874-1] thunderbird security update",
                  tags: [
                     "mailing-list",
                     "x_refsource_MLIST",
                     "x_transferred",
                  ],
                  url: "https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html",
               },
            ],
            title: "CVE Program Container",
         },
      ],
      cna: {
         affected: [
            {
               product: "Firefox",
               vendor: "Mozilla",
               versions: [
                  {
                     lessThan: "94",
                     status: "affected",
                     version: "unspecified",
                     versionType: "custom",
                  },
               ],
            },
            {
               product: "Thunderbird",
               vendor: "Mozilla",
               versions: [
                  {
                     lessThan: "91.3",
                     status: "affected",
                     version: "unspecified",
                     versionType: "custom",
                  },
               ],
            },
            {
               product: "Firefox ESR",
               vendor: "Mozilla",
               versions: [
                  {
                     lessThan: "91.3",
                     status: "affected",
                     version: "unspecified",
                     versionType: "custom",
                  },
               ],
            },
         ],
         descriptions: [
            {
               lang: "en",
               value: "Mozilla developers and community members reported memory safety bugs present in Firefox 93 and Firefox ESR 91.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.",
            },
         ],
         problemTypes: [
            {
               descriptions: [
                  {
                     description: "Memory safety bugs fixed in Firefox 94 and Firefox ESR 91.3",
                     lang: "en",
                     type: "text",
                  },
               ],
            },
         ],
         providerMetadata: {
            dateUpdated: "2022-01-04T11:07:06",
            orgId: "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
            shortName: "mozilla",
         },
         references: [
            {
               tags: [
                  "x_refsource_MISC",
               ],
               url: "https://www.mozilla.org/security/advisories/mfsa2021-49/",
            },
            {
               tags: [
                  "x_refsource_MISC",
               ],
               url: "https://www.mozilla.org/security/advisories/mfsa2021-50/",
            },
            {
               tags: [
                  "x_refsource_MISC",
               ],
               url: "https://www.mozilla.org/security/advisories/mfsa2021-48/",
            },
            {
               tags: [
                  "x_refsource_MISC",
               ],
               url: "https://bugzilla.mozilla.org/buglist.cgi?bug_id=1606864%2C1712671%2C1730048%2C1735152",
            },
            {
               name: "DSA-5026",
               tags: [
                  "vendor-advisory",
                  "x_refsource_DEBIAN",
               ],
               url: "https://www.debian.org/security/2021/dsa-5026",
            },
            {
               name: "[debian-lts-announce] 20211229 [SECURITY] [DLA 2863-1] firefox-esr security update",
               tags: [
                  "mailing-list",
                  "x_refsource_MLIST",
               ],
               url: "https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html",
            },
            {
               name: "DSA-5034",
               tags: [
                  "vendor-advisory",
                  "x_refsource_DEBIAN",
               ],
               url: "https://www.debian.org/security/2022/dsa-5034",
            },
            {
               name: "[debian-lts-announce] 20220104 [SECURITY] [DLA 2874-1] thunderbird security update",
               tags: [
                  "mailing-list",
                  "x_refsource_MLIST",
               ],
               url: "https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html",
            },
         ],
         x_legacyV4Record: {
            CVE_data_meta: {
               ASSIGNER: "security@mozilla.org",
               ID: "CVE-2021-43534",
               STATE: "PUBLIC",
            },
            affects: {
               vendor: {
                  vendor_data: [
                     {
                        product: {
                           product_data: [
                              {
                                 product_name: "Firefox",
                                 version: {
                                    version_data: [
                                       {
                                          version_affected: "<",
                                          version_value: "94",
                                       },
                                    ],
                                 },
                              },
                              {
                                 product_name: "Thunderbird",
                                 version: {
                                    version_data: [
                                       {
                                          version_affected: "<",
                                          version_value: "91.3",
                                       },
                                    ],
                                 },
                              },
                              {
                                 product_name: "Firefox ESR",
                                 version: {
                                    version_data: [
                                       {
                                          version_affected: "<",
                                          version_value: "91.3",
                                       },
                                    ],
                                 },
                              },
                           ],
                        },
                        vendor_name: "Mozilla",
                     },
                  ],
               },
            },
            data_format: "MITRE",
            data_type: "CVE",
            data_version: "4.0",
            description: {
               description_data: [
                  {
                     lang: "eng",
                     value: "Mozilla developers and community members reported memory safety bugs present in Firefox 93 and Firefox ESR 91.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.",
                  },
               ],
            },
            problemtype: {
               problemtype_data: [
                  {
                     description: [
                        {
                           lang: "eng",
                           value: "Memory safety bugs fixed in Firefox 94 and Firefox ESR 91.3",
                        },
                     ],
                  },
               ],
            },
            references: {
               reference_data: [
                  {
                     name: "https://www.mozilla.org/security/advisories/mfsa2021-49/",
                     refsource: "MISC",
                     url: "https://www.mozilla.org/security/advisories/mfsa2021-49/",
                  },
                  {
                     name: "https://www.mozilla.org/security/advisories/mfsa2021-50/",
                     refsource: "MISC",
                     url: "https://www.mozilla.org/security/advisories/mfsa2021-50/",
                  },
                  {
                     name: "https://www.mozilla.org/security/advisories/mfsa2021-48/",
                     refsource: "MISC",
                     url: "https://www.mozilla.org/security/advisories/mfsa2021-48/",
                  },
                  {
                     name: "https://bugzilla.mozilla.org/buglist.cgi?bug_id=1606864%2C1712671%2C1730048%2C1735152",
                     refsource: "MISC",
                     url: "https://bugzilla.mozilla.org/buglist.cgi?bug_id=1606864%2C1712671%2C1730048%2C1735152",
                  },
                  {
                     name: "DSA-5026",
                     refsource: "DEBIAN",
                     url: "https://www.debian.org/security/2021/dsa-5026",
                  },
                  {
                     name: "[debian-lts-announce] 20211229 [SECURITY] [DLA 2863-1] firefox-esr security update",
                     refsource: "MLIST",
                     url: "https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html",
                  },
                  {
                     name: "DSA-5034",
                     refsource: "DEBIAN",
                     url: "https://www.debian.org/security/2022/dsa-5034",
                  },
                  {
                     name: "[debian-lts-announce] 20220104 [SECURITY] [DLA 2874-1] thunderbird security update",
                     refsource: "MLIST",
                     url: "https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html",
                  },
               ],
            },
         },
      },
   },
   cveMetadata: {
      assignerOrgId: "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
      assignerShortName: "mozilla",
      cveId: "CVE-2021-43534",
      datePublished: "2021-12-08T21:20:42",
      dateReserved: "2021-11-08T00:00:00",
      dateUpdated: "2024-08-04T03:55:29.303Z",
      state: "PUBLISHED",
   },
   dataType: "CVE_RECORD",
   dataVersion: "5.1",
   "vulnerability-lookup:meta": {
      nvd: "{\"cve\":{\"id\":\"CVE-2021-43534\",\"sourceIdentifier\":\"security@mozilla.org\",\"published\":\"2021-12-08T22:15:09.467\",\"lastModified\":\"2024-11-21T06:29:22.413\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Mozilla developers and community members reported memory safety bugs present in Firefox 93 and Firefox ESR 91.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.\"},{\"lang\":\"es\",\"value\":\"Los desarrolladores y miembros de la comunidad de Mozilla informaron de bugs de seguridad de memoria presentes en Firefox 93 y Firefox ESR 91.2. Algunos de estos bugs mostraban evidencias de corrupción de memoria y suponemos que con suficiente esfuerzo algunos de ellos podrían haber sido explotados para ejecutar código arbitrario. Esta vulnerabilidad afecta a Firefox versiones anteriores a 94, Thunderbird versiones anteriores a 91.3 y Firefox ESR versiones anteriores a 91.3\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.9}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:M/Au:N/C:P/I:P/A:P\",\"baseScore\":6.8,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":8.6,\"impactScore\":6.4,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":true}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-787\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"94.0\",\"matchCriteriaId\":\"A22FDA8A-B862-4383-9C8E-C162713AB01B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"91.3.0\",\"matchCriteriaId\":\"DEA65EE6-233C-4CC1-83E8-316748943DAF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"91.3.0\",\"matchCriteriaId\":\"65E19CA9-5FDF-4253-8D56-FD82239F7D93\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"DEECE5FC-CACF-4496-A3E7-164736409252\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FA6FEEC2-9F11-4643-8827-749718254FED\"}]}]}],\"references\":[{\"url\":\"https://bugzilla.mozilla.org/buglist.cgi?bug_id=1606864%2C1712671%2C1730048%2C1735152\",\"source\":\"security@mozilla.org\",\"tags\":[\"Broken Link\",\"Issue Tracking\",\"Vendor Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html\",\"source\":\"security@mozilla.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html\",\"source\":\"security@mozilla.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://www.debian.org/security/2021/dsa-5026\",\"source\":\"security@mozilla.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.debian.org/security/2022/dsa-5034\",\"source\":\"security@mozilla.org\",\"tags\":[\"Issue Tracking\",\"Third Party Advisory\"]},{\"url\":\"https://www.mozilla.org/security/advisories/mfsa2021-48/\",\"source\":\"security@mozilla.org\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://www.mozilla.org/security/advisories/mfsa2021-49/\",\"source\":\"security@mozilla.org\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://www.mozilla.org/security/advisories/mfsa2021-50/\",\"source\":\"security@mozilla.org\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://bugzilla.mozilla.org/buglist.cgi?bug_id=1606864%2C1712671%2C1730048%2C1735152\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Broken Link\",\"Issue Tracking\",\"Vendor Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://www.debian.org/security/2021/dsa-5026\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.debian.org/security/2022/dsa-5034\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Issue Tracking\",\"Third Party Advisory\"]},{\"url\":\"https://www.mozilla.org/security/advisories/mfsa2021-48/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://www.mozilla.org/security/advisories/mfsa2021-49/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://www.mozilla.org/security/advisories/mfsa2021-50/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}",
   },
}


Log in or create an account to share your comment.

Security Advisory comment format.

This schema specifies the format of a comment related to a security advisory.

UUIDv4 of the comment
UUIDv4 of the Vulnerability-Lookup instance
When the comment was created originally
When the comment was last updated
Title of the comment
Description of the comment
The identifier of the vulnerability (CVE ID, GHSA-ID, PYSEC ID, etc.).



Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.