#VU61885 Out-of-bounds write in Mozilla Firefox and Firefox ESR
Vulnerability identifier: #VU61885
Vulnerability risk: High
CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-787
Exploitation vector: Network
Exploit availability: Yes
Vulnerable software:
Mozilla Firefox
Client/Desktop applications /
Web browsers
Firefox ESR
Client/Desktop applications /
Web browsers
Vendor: Mozilla
Description
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when handling an unexpected number of WebAuthN Extensions in a Register command to the parent process. A remote attacker can create a specially crafted web page, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code on the target system.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Mozilla Firefox: 70.0 - 98.0.2
Firefox ESR: 91.0 - 91.7.1, 78.0 - 78.15.0
External links
http://www.mozilla.org/en-US/security/advisories/mfsa2022-13/
http://www.mozilla.org/en-US/security/advisories/mfsa2022-14/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
