Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 89.0 |
| Mozilla | Firefox Esr | < 78.11 |
| Mozilla | Thunderbird | < 78.11 |
| Microsoft | Windows | - |
Related Weaknesses (CWE)
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1706501Permissions RequiredVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-23/Release NotesVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-24/Release NotesVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-26/Release NotesVendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1706501Permissions RequiredVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-23/Release NotesVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-24/Release NotesVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-26/Release NotesVendor Advisory
FAQ
What is CVE-2021-29964?
CVE-2021-29964 is a vulnerability with a CVSS score of 7.1 (HIGH). 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 operati...
How severe is CVE-2021-29964?
CVE-2021-29964 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-29964?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox, Mozilla Firefox Esr, Mozilla Thunderbird, Microsoft Windows.