Vulnerability Details : CVE-2021-29964
A locally-installed hostile program could send `WM_COPYDATA` messages that Firefox would process incorrectly, leading to an out-of-bounds read. *This bug only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability affects Thunderbird < 78.11, Firefox < 89, and Firefox ESR < 78.11.
Products affected by CVE-2021-29964
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-29964
0.32%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 53 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-29964
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:N/A:P |
8.6
|
4.9
|
NIST | |
|
7.1
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H |
1.8
|
5.2
|
NIST |
CWE ids for CVE-2021-29964
-
The product reads data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-29964
-
https://www.mozilla.org/security/advisories/mfsa2021-23/
Security Vulnerabilities fixed in Firefox 89 — MozillaRelease Notes;Vendor Advisory
-
https://www.mozilla.org/security/advisories/mfsa2021-26/
Security Vulnerabilities fixed in Thunderbird 78.11 — MozillaRelease Notes;Vendor Advisory
-
https://www.mozilla.org/security/advisories/mfsa2021-24/
Security Vulnerabilities fixed in Firefox ESR 78.11 — MozillaRelease Notes;Vendor Advisory
-
https://bugzilla.mozilla.org/show_bug.cgi?id=1706501
Access DeniedPermissions Required;Vendor Advisory
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