{"id":"CVE-2021-38493","state":"PUBLISHED","title":"Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78.13. Some of these bugs showed evidence of memory corruption and we presume that with enough ","description":"Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78.13. 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 ESR < 78.14, Thunderbird < 78.14, and Firefox < 92.","publishedAt":"2021-11-03T00:03:49.000Z","updatedAt":"2024-08-04T01:44:22.825Z","severity":null,"assigner":"mozilla","products":["Mozilla Firefox ESR","Mozilla Thunderbird","Mozilla Firefox"],"affected":[{"vendor":"Mozilla","product":"Firefox ESR","versions":[{"version":"unspecified","status":"affected","lessThan":"78.14","versionType":"custom"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"unspecified","status":"affected","lessThan":"78.14","versionType":"custom"}]},{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"unspecified","status":"affected","lessThan":"92","versionType":"custom"}]}],"references":["https://www.mozilla.org/security/advisories/mfsa2021-38/","https://www.mozilla.org/security/advisories/mfsa2021-42/","https://www.mozilla.org/security/advisories/mfsa2021-39/","https://bugzilla.mozilla.org/buglist.cgi?bug_id=1723391%2C1724101%2C1724107","https://security.gentoo.org/glsa/202202-03","https://security.gentoo.org/glsa/202208-14"],"weaknesses":[],"ingestedAt":"2026-10-29T19:48:49.871Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/38xxx/CVE-2021-38493.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-38493","state":"PUBLISHED","datePublished":"2021-11-03T00:03:49.000Z","dateUpdated":"2024-08-04T01:44:22.825Z","assignerShortName":"mozilla","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateReserved":"2021-08-10T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78.13. 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 ESR < 78.14, Thunderbird < 78.14, and Firefox < 92."}],"affected":[{"vendor":"Mozilla","product":"Firefox ESR","versions":[{"version":"unspecified","status":"affected","lessThan":"78.14","versionType":"custom"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"unspecified","status":"affected","lessThan":"78.14","versionType":"custom"}]},{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"unspecified","status":"affected","lessThan":"92","versionType":"custom"}]}],"references":[{"url":"https://www.mozilla.org/security/advisories/mfsa2021-38/","tags":["x_refsource_MISC"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2021-42/","tags":["x_refsource_MISC"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2021-39/","tags":["x_refsource_MISC"]},{"url":"https://bugzilla.mozilla.org/buglist.cgi?bug_id=1723391%2C1724101%2C1724107","tags":["x_refsource_MISC"]},{"url":"https://security.gentoo.org/glsa/202202-03","name":"GLSA-202202-03","tags":["vendor-advisory","x_refsource_GENTOO"]},{"url":"https://security.gentoo.org/glsa/202208-14","name":"GLSA-202208-14","tags":["vendor-advisory","x_refsource_GENTOO"]}],"problemTypes":[{"descriptions":[{"description":"Memory safety bugs fixed in Firefox 92, Firefox ESR 78.14 and Firefox ESR 91.1","lang":"en","type":"text"}]}],"providerMetadata":{"shortName":"mozilla","dateUpdated":"2022-08-10T05:13:21.000Z","orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"security@mozilla.org","ID":"CVE-2021-38493","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Firefox ESR","version":{"version_data":[{"version_affected":"<","version_value":"78.14"}]}},{"product_name":"Thunderbird","version":{"version_data":[{"version_affected":"<","version_value":"78.14"}]}},{"product_name":"Firefox","version":{"version_data":[{"version_affected":"<","version_value":"92"}]}}]},"vendor_name":"Mozilla"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78.13. 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 ESR < 78.14, Thunderbird < 78.14, and Firefox < 92."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"Memory safety bugs fixed in Firefox 92, Firefox ESR 78.14 and Firefox ESR 91.1"}]}]},"references":{"reference_data":[{"name":"https://www.mozilla.org/security/advisories/mfsa2021-38/","refsource":"MISC","url":"https://www.mozilla.org/security/advisories/mfsa2021-38/"},{"name":"https://www.mozilla.org/security/advisories/mfsa2021-42/","refsource":"MISC","url":"https://www.mozilla.org/security/advisories/mfsa2021-42/"},{"name":"https://www.mozilla.org/security/advisories/mfsa2021-39/","refsource":"MISC","url":"https://www.mozilla.org/security/advisories/mfsa2021-39/"},{"name":"https://bugzilla.mozilla.org/buglist.cgi?bug_id=1723391%2C1724101%2C1724107","refsource":"MISC","url":"https://bugzilla.mozilla.org/buglist.cgi?bug_id=1723391%2C1724101%2C1724107"},{"name":"GLSA-202202-03","refsource":"GENTOO","url":"https://security.gentoo.org/glsa/202202-03"},{"name":"GLSA-202208-14","refsource":"GENTOO","url":"https://security.gentoo.org/glsa/202208-14"}]}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://www.mozilla.org/security/advisories/mfsa2021-38/","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2021-42/","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2021-39/","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://bugzilla.mozilla.org/buglist.cgi?bug_id=1723391%2C1724101%2C1724107","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://security.gentoo.org/glsa/202202-03","name":"GLSA-202202-03","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred"]},{"url":"https://security.gentoo.org/glsa/202208-14","name":"GLSA-202208-14","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T01:44:22.825Z"}}]}}}