{"schemaVersion":3,"id":"CVE-2023-6212","aliases":["UBUNTU-CVE-2023-6212","DEBIAN-CVE-2023-6212","CGA-gfqw-wqch-r9mw","CGA-ww37-wccv-x5fg"],"status":"published","duplicateOf":null,"title":null,"description":"Memory safety bugs present in Firefox 119, Firefox ESR 115.4, and Thunderbird 115.4. 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 < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.","dates":{"published":"2023-11-21T14:28:54.749Z","modified":"2025-02-13T17:26:14.068Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":8.8,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":8.8,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","exploitability":7.2,"impact":9.8,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":8.8,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","exploitability":7.2,"impact":9.8,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Chainguard","score":8.8,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","exploitability":7.2,"impact":9.8,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":8.8,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00947,"percentile":0.60766,"severity":"low","asOf":"2026-10-22T00:00:00.000Z","change":{"pp":0.11699999999999991,"baselineDate":"2026-09-22T00:00:00.000Z","baselineScore":0.0083},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00947,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00947,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00947,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.00947,"percentile":0.60766}],"last30":[{"date":"2026-09-22T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0083,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00947,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00947,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00947,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.00947,"percentile":0.60766}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-787","name":"Out-of-bounds Write","description":"The product writes data past the end, or before the beginning, of the intended buffer.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/787.html"}],"affected":[{"vendor":"chainguard","product":"firefox-esr","name":"firefox-esr","label":"firefox-esr","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/firefox-esr","purlType":"apk","versions":[{"text":"< 120.0-r0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 120.0-r0","eol":null,"hubHref":null},{"vendor":"debian","product":"firefox-esr","name":"firefox-esr","label":"firefox-esr","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/firefox-esr","purlType":"deb","versions":[{"text":"< 115.5.0esr-1~deb12u1","noFixRecorded":false,"fixedIn":null},{"text":"< 115.5.0esr-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 115.5.0esr-1~deb12u1 | < 115.5.0esr-1","eol":null,"hubHref":null},{"vendor":"debian","product":"thunderbird","name":"thunderbird","label":"thunderbird","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/thunderbird","purlType":"deb","versions":[{"text":"< 1:115.5.0-1~deb12u1","noFixRecorded":false,"fixedIn":null},{"text":"< 1:115.5.0-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1:115.5.0-1~deb12u1 | < 1:115.5.0-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"firefox","name":"firefox","label":"firefox","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/firefox","purlType":"deb","versions":[{"text":"< 120.0+build2-0ubuntu0.20.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 120.0+build2-0ubuntu0.20.04.1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"mozjs102","name":"mozjs102","label":"mozjs102","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/mozjs102","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"mozjs38","name":"mozjs38","label":"mozjs38","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/mozjs38","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"mozjs52","name":"mozjs52","label":"mozjs52","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/mozjs52","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"mozjs68","name":"mozjs68","label":"mozjs68","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/mozjs68","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"mozjs78","name":"mozjs78","label":"mozjs78","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/mozjs78","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"mozjs91","name":"mozjs91","label":"mozjs91","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/mozjs91","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"thunderbird","name":"thunderbird","label":"thunderbird","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/thunderbird","purlType":"deb","versions":[{"text":"< 1:115.5.0+build1-0ubuntu0.20.04.1","noFixRecorded":false,"fixedIn":null},{"text":"< 1:115.5.0+build1-0ubuntu0.22.04.1","noFixRecorded":false,"fixedIn":null},{"text":"< 1:115.5.0+build1-0ubuntu1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1:115.5.0+build1-0ubuntu0.20.04.1 | < 1:115.5.0+build1-0ubuntu0.22.04.1 | < 1:115.5.0+build1-0ubuntu1","eol":null,"hubHref":null},{"vendor":"debian","product":"debian_linux","name":"debian linux","label":"debian_linux","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"10.0","noFixRecorded":false,"fixedIn":null},{"text":"11.0","noFixRecorded":false,"fixedIn":null},{"text":"12.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"10.0 | 11.0 | 12.0","eol":{"isEol":true,"eolDate":"2024-06-30T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"10","label":"10 (Buster)","eolFrom":"2024-06-30T00:00:00.000Z","isLts":false,"isMaintained":true,"latestVersion":"10.13"},"product":{"name":"debian","label":"Debian","category":"os"}},"hubHref":"/vendor/debian/debian_linux"},{"vendor":"mozilla","product":"firefox","name":"Firefox","label":"firefox","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ unspecified, < 120","noFixRecorded":false,"fixedIn":null},{"text":"< 120.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ unspecified, < 120 | < 120.0","eol":{"isEol":null,"eolDate":null,"matchMethod":"cpe","cycle":null,"product":{"name":"firefox","label":"Firefox","category":"app"}},"hubHref":"/vendor/mozilla/firefox"},{"vendor":"mozilla","product":"firefox_esr","name":"firefox esr","label":"firefox_esr","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ unspecified, < 115.5.0","noFixRecorded":false,"fixedIn":null},{"text":"< 115.5.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ unspecified, < 115.5.0 | < 115.5.0","eol":null,"hubHref":"/vendor/mozilla/firefox_esr"},{"vendor":"mozilla","product":"thunderbird","name":"Thunderbird","label":"thunderbird","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ unspecified, < 115.5","noFixRecorded":false,"fixedIn":null},{"text":"< 115.5","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ unspecified, < 115.5 | < 115.5","eol":null,"hubHref":"/vendor/mozilla/thunderbird"}],"affectedCount":15,"eol":{"hasEol":true,"count":1},"references":[{"url":"https://bugzilla.mozilla.org/buglist.cgi?bug_id=1658432%2C1820983%2C1829252%2C1856072%2C1856091%2C1859030%2C1860943%2C1862782","label":"bugzilla.mozilla.org/buglist.cgi","hostname":"bugzilla.mozilla.org","tags":["REPORT","Broken Link"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2023-49/","label":"www.mozilla.org/security/advisories/mfsa2023-49/","hostname":"www.mozilla.org","tags":["REPORT","Advisory","Release Notes","Vendor Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2023-50/","label":"www.mozilla.org/security/advisories/mfsa2023-50/","hostname":"www.mozilla.org","tags":["REPORT","Advisory","Release Notes","Vendor Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2023-52/","label":"www.mozilla.org/security/advisories/mfsa2023-52/","hostname":"www.mozilla.org","tags":["REPORT","Advisory","Release Notes","Vendor Advisory"]},{"url":"https://www.debian.org/security/2023/dsa-5561","label":"www.debian.org/security/2023/dsa-5561","hostname":"www.debian.org","tags":["Advisory","Third Party Advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2023/11/msg00017.html","label":"lists.debian.org/debian-lts-announce/2023/11/msg00017.html","hostname":"lists.debian.org","tags":["ARTICLE","Mailing List"]},{"url":"https://lists.debian.org/debian-lts-announce/2023/11/msg00030.html","label":"lists.debian.org/debian-lts-announce/2023/11/msg00030.html","hostname":"lists.debian.org","tags":["WEB"]},{"url":"https://ubuntu.com/security/CVE-2023-6212","label":"ubuntu.com/security/CVE-2023-6212","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.mozilla.org/en-US/security/advisories/mfsa2023-49/#CVE-2023-6212","label":"www.mozilla.org/en-US/security/advisories/mfsa2023-49/","hostname":"www.mozilla.org","tags":["REPORT"]},{"url":"https://www.mozilla.org/en-US/security/advisories/mfsa2023-50/#CVE-2023-6212","label":"www.mozilla.org/en-US/security/advisories/mfsa2023-50/","hostname":"www.mozilla.org","tags":["REPORT"]},{"url":"https://www.mozilla.org/en-US/security/advisories/mfsa2023-52/#CVE-2023-6212","label":"www.mozilla.org/en-US/security/advisories/mfsa2023-52/","hostname":"www.mozilla.org","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-6509-1","label":"ubuntu.com/security/notices/USN-6509-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/notices/USN-6515-1","label":"ubuntu.com/security/notices/USN-6515-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-6212","label":"www.cve.org/CVERecord?id=CVE-2023-6212","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2023-6212","label":"security-tracker.debian.org/tracker/CVE-2023-6212","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":["DLA-3661-1","DLA-3674-1","DSA-5561-1","DSA-5566-1","MGASA-2023-0342","MGASA-2023-0343","OPENSUSE-SU-2024:13459-1","OPENSUSE-SU-2024:13468-1","OPENSUSE-SU-2024:14572-1","RHSA-2023:7499","RHSA-2023:7500","RHSA-2023:7501","RHSA-2023:7502","RHSA-2023:7503","RHSA-2023:7504","RHSA-2023:7505","RHSA-2023:7506","RHSA-2023:7507","RHSA-2023:7508","RHSA-2023:7509","RHSA-2023:7510","RHSA-2023:7511","RHSA-2023:7512","RHSA-2023:7547","RHSA-2023:7569","RHSA-2023:7570","RHSA-2023:7573","RHSA-2023:7574","RHSA-2023:7577","SUSE-SU-2023:4588-1","SUSE-SU-2023:4912-1","SUSE-SU-2023:4928-1","SUSE-SU-2023:4929-1","USN-6509-1","USN-6515-1"],"duplicates":[],"related":["CGA-GV52-8QC8-RHC4","OPENSUSE-SU-2024:13459-1","OPENSUSE-SU-2024:13468-1","OPENSUSE-SU-2024:14572-1","SUSE-SU-2023:4588-1","SUSE-SU-2023:4912-1","SUSE-SU-2023:4928-1","SUSE-SU-2023:4929-1","USN-6509-1","USN-6515-1"]},"timeline":[{"kind":"published","date":"2023-11-21T14:28:54.749Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2025-02-13T17:26:14.068Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":35,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T14:56:48.164Z","stale":false,"partial":false}}