Vulnerability Details : CVE-2020-12395

Mozilla developers and community members reported memory safety bugs present in Firefox 75 and Firefox ESR 68.7. 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 ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.

Vulnerability category: Memory Corruption

Published 2020-05-26 17:15:10

Updated 2022-04-26 19:24:24

Source Mozilla Corporation

View at NVD, CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2020-12395

Probability of exploitation activity in the next 30 days: 0.60%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 76 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2020-12395

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Source
10.0	HIGH	AV:N/AC:L/Au:N/C:C/I:C/A:C	10.0	10.0	nvd@nist.gov
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Complete Integrity Impact: Complete Availability Impact: Complete
9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9	nvd@nist.gov
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2020-12395

CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-12395

https://www.mozilla.org/security/advisories/mfsa2020-16/

Security Vulnerabilities fixed in Firefox 76 — Mozilla
Vendor Advisory

CVEs referencing this url
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1595886%2C1611482%2C1614704%2C1624098%2C1625749%2C1626382%2C1628076%2C1631508

Bug List
Broken Link;Issue Tracking
https://www.mozilla.org/security/advisories/mfsa2020-17/

Security Vulnerabilities fixed in Firefox ESR 68.8 — Mozilla
Vendor Advisory

CVEs referencing this url
https://www.mozilla.org/security/advisories/mfsa2020-18/

Security Vulnerabilities fixed in Thunderbird 68.8.0 — Mozilla
Vendor Advisory

CVEs referencing this url
https://usn.ubuntu.com/4373-1/

USN-4373-1: Thunderbird vulnerabilities | Ubuntu security notices
Third Party Advisory

CVEs referencing this url
https://security.gentoo.org/glsa/202005-04

Mozilla Firefox: Multiple vulnerabilities (GLSA 202005-04) — Gentoo security
Third Party Advisory

CVEs referencing this url
https://security.gentoo.org/glsa/202005-03

Mozilla Thunderbird: Multiple vulnerabilities (GLSA 202005-03) — Gentoo security
Third Party Advisory

CVEs referencing this url

Products affected by CVE-2020-12395

Mozilla » Firefox
Versions before (<) 76.0
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
Matching versions
Mozilla » Thunderbird
Versions before (<) 68.8.0
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Matching versions
Mozilla » Firefox Esr
Versions before (<) 68.8.0
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 18.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 19.10
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 16.04 ESM Edition
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 20.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
Matching versions