Out-of-bounds read in Mozilla Firefox and Firefox ESR - CVE-2021-29964
Published: June 1, 2021
Vulnerability identifier: #VU53706
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-29964
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Mozilla
Affected software:
Mozilla Firefox
Firefox ESR
Mozilla Firefox
Firefox ESR
Detailed vulnerability description
The vulnerability allows a local application to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition. A locally-installed hostile program could send WM_COPYDATA messages that Firefox would processing incorrectly and will result in out-of-bounds read.
Note, the vulnerability affects Windows installations only.
How to mitigate CVE-2021-29964
Install updates from vendor's website.