{ "id": "CVE-2021-43535", "sourceIdentifier": "security@mozilla.org", "published": "2021-12-08T22:15:09.517", "lastModified": "2022-03-17T19:58:14.983", "vulnStatus": "Analyzed", "descriptions": [ { "lang": "en", "value": "A use-after-free could have occured when an HTTP2 session object was released on a different thread, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 93, Thunderbird < 91.3, and Firefox ESR < 91.3." }, { "lang": "es", "value": "Podr\u00eda haberse producido un uso de memoria previamente liberada cuando un objeto de sesi\u00f3n HTTP2 se liberaba en un hilo diferente, conllevando a una corrupci\u00f3n de memoria y un fallo potencialmente explotable. Esta vulnerabilidad afecta a Firefox versiones anteriores a 93, 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", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "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", "accessVector": "NETWORK", "accessComplexity": "MEDIUM", "authentication": "NONE", "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "baseScore": 6.8 }, "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-416" } ] } ], "configurations": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*", "versionEndExcluding": "93.0", "matchCriteriaId": "B38B28B1-FAB5-47DB-9C73-0CFB79CCDE79" }, { "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/show_bug.cgi?id=1667102", "source": "security@mozilla.org", "tags": [ "Issue Tracking", "Permissions Required", "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/mfsa2021-43/", "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" ] } ] }