CVE-2021-29984

Instruction reordering resulted in a sequence of instructions that would cause an object to be incorrectly considered during garbage collection. This led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.

CVSS v3.0 8.8 HIGH
CVSS v2.0 6.8 MEDIUM

8.8^/10

CVSS v3.0 : 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://www.mozilla.org/security/advisories/mfsa2021-34/	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-33/	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-36/	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-35/	Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1720031	Issue Tracking Permissions Required Vendor Advisory
https://security.gentoo.org/glsa/202202-03	Third Party Advisory

Configurations

Configuration 1 (hide)

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

Information

Published : 2021-08-17 20:15

Updated : 2022-05-03 16:04

NVD link : CVE-2021-29984

Mitre link : CVE-2021-29984

JSON object : View

Products Affected

mozilla

firefox_esr
thunderbird
firefox

CWE

CWE-787

Out-of-bounds Write

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://www.mozilla.org/security/advisories/mfsa2021-34/", "name": "https://www.mozilla.org/security/advisories/mfsa2021-34/", "tags": ["Vendor Advisory"], "refsource": "MISC"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2021-33/", "name": "https://www.mozilla.org/security/advisories/mfsa2021-33/", "tags": ["Vendor Advisory"], "refsource": "MISC"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2021-36/", "name": "https://www.mozilla.org/security/advisories/mfsa2021-36/", "tags": ["Vendor Advisory"], "refsource": "MISC"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2021-35/", "name": "https://www.mozilla.org/security/advisories/mfsa2021-35/", "tags": ["Vendor Advisory"], "refsource": "MISC"}, {"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1720031", "name": "https://bugzilla.mozilla.org/show_bug.cgi?id=1720031", "tags": ["Issue Tracking", "Permissions Required", "Vendor Advisory"], "refsource": "MISC"}, {"url": "https://security.gentoo.org/glsa/202202-03", "name": "GLSA-202202-03", "tags": ["Third Party Advisory"], "refsource": "GENTOO"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "Instruction reordering resulted in a sequence of instructions that would cause an object to be incorrectly considered during garbage collection. This led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-787"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-29984", "ASSIGNER": "security@mozilla.org"}}, "impact": {"baseMetricV2": {"cvssV2": {"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"}, "severity": "MEDIUM", "acInsufInfo": false, "impactScore": 6.4, "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true}, "baseMetricV3": {"cvssV3": {"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}}, "publishedDate": "2021-08-17T20:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "78.13.0"}, {"cpe23Uri": "cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "78.13.0"}, {"cpe23Uri": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "91.0"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2022-05-03T16:04Z"}