#VU52336 Use-after-free
Vulnerability identifier: #VU52336
Vulnerability risk: High
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-416
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Mozilla Firefox
Client/Desktop applications /
Web browsers
Vendor: Mozilla
Description
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error caused by unexpected data type conversions when freeing fonts from cache. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger a use-after-free error and execute arbitrary code on the system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Mozilla Firefox: 80.0 - 87.0
CPE
- cpe:2.3:a:mozilla:mozilla_firefox:87.0:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:mozilla_firefox:86.0.1:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:mozilla_firefox:86.0:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:mozilla_firefox:85.0.2:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:mozilla_firefox:85.0.1:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:mozilla_firefox:85.0:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:mozilla_firefox:84.0.2:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:mozilla_firefox:84.0.1:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:mozilla_firefox:84.0:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:mozilla_firefox:83.0:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:mozilla_firefox:82.0.3:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:mozilla_firefox:82.0.2:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:mozilla_firefox:82.0.1:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:mozilla_firefox:82.0:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:mozilla_firefox:81.0.2:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:mozilla_firefox:81.0.1:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:mozilla_firefox:81.0:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:mozilla_firefox:80.0.1:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:mozilla_firefox:80.0:*:*:*:*:*:*:*
External links
http://www.mozilla.org/en-US/security/advisories/mfsa2021-16/
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.
