CVE-2021-23978

Mozilla developers reported memory safety bugs present in Firefox 85 and Firefox ESR 78.7. 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 < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.

CVSS v3 8.8 HIGH
CVSS v2.0 6.8 MEDIUM

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:P/I:P/A:P

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://bugzilla.mozilla.org/buglist.cgi?bug_id=786797%2C1682928%2C1687391%2C1687597	Broken Link Issue Tracking Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/03/msg00000.html	Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202104-09	Third Party Advisory
https://security.gentoo.org/glsa/202104-10	Third Party Advisory
https://www.debian.org/security/2021/dsa-4866	Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2021-07/	Release Notes Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-08/	Release Notes Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-09/	Release Notes Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:mozilla:firefox::::::::
	cpe:2.3:a:mozilla:firefox_esr::::::::
	cpe:2.3:a:mozilla:thunderbird::::::::

Configuration 2 (hide)

OR	cpe:2.3:o:debian:debian_linux:9.0:::::::*
	cpe:2.3:o:debian:debian_linux:10.0:::::::*

History

No history.

Information

Published : 2021-02-26 16:15

Updated : 2022-05-27 18:30

NVD link : CVE-2021-23978

Mitre link : CVE-2021-23978

CVE.ORG link : CVE-2021-23978

JSON object : View

Products Affected

debian

debian_linux

mozilla

thunderbird
firefox
firefox_esr

CWE

CWE-787

Out-of-bounds Write

{"id": "CVE-2021-23978", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 6.8, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "MEDIUM", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "published": "2021-02-26T16:15:12.673", "references": [{"url": "https://bugzilla.mozilla.org/buglist.cgi?bug_id=786797%2C1682928%2C1687391%2C1687597", "tags": ["Broken Link", "Issue Tracking", "Vendor Advisory"], "source": "security@mozilla.org"}, {"url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00000.html", "tags": ["Mailing List", "Third Party Advisory"], "source": "security@mozilla.org"}, {"url": "https://security.gentoo.org/glsa/202104-09", "tags": ["Third Party Advisory"], "source": "security@mozilla.org"}, {"url": "https://security.gentoo.org/glsa/202104-10", "tags": ["Third Party Advisory"], "source": "security@mozilla.org"}, {"url": "https://www.debian.org/security/2021/dsa-4866", "tags": ["Third Party Advisory"], "source": "security@mozilla.org"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2021-07/", "tags": ["Release Notes", "Vendor Advisory"], "source": "security@mozilla.org"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2021-08/", "tags": ["Release Notes", "Vendor Advisory"], "source": "security@mozilla.org"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2021-09/", "tags": ["Release Notes", "Vendor Advisory"], "source": "security@mozilla.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "Mozilla developers reported memory safety bugs present in Firefox 85 and Firefox ESR 78.7. 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 < 86, Thunderbird < 78.8, and Firefox ESR < 78.8."}, {"lang": "es", "value": "Los desarrolladores de Mozilla reportaron bugs de seguridad de la memoria presentes en Firefox versi\u00f3n 85 y Firefox ESR versi\u00f3n 78.7. Algunos de estos bugs mostraron evidencia de corrupci\u00f3n de la memoria y suponemos que con esfuerzo suficiente algunos de ellos podr\u00edan haber sido explotado para ejecutar c\u00f3digo arbitrario. Esta vulnerabilidad afecta a Firefox versiones anteriores a 86, Thunderbird versiones anteriores a 78,8 y Firefox ESR versiones anteriores a 78,8"}], "lastModified": "2022-05-27T18:30:39.750", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "89580DC6-183F-46F0-A27E-4E16D6B10EB6", "versionEndExcluding": "86.0"}, {"criteria": "cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6A523AED-F145-4D51-BF78-95B61B8A0B34", "versionEndExcluding": "78.8"}, {"criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3ABA16AF-38C2-4445-B41F-9228C97A89C1", "versionEndExcluding": "78.8"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252"}, {"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73"}], "operator": "OR"}]}], "sourceIdentifier": "security@mozilla.org"}