Vulnerability identifier: #VU52346
Vulnerability risk: Low
CVSSv3.1: 2.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-20
Exploitation vector: Network
Exploit availability: No
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 bypass implemented security restrictions.
The vulnerability exists due to insufficient validation of user-supplied input. Ports that were written as an integer overflow above the bounds of a 16-bit integer could have bypassed port blocking restrictions when used in the Alt-Svc header.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Mozilla Firefox: 60.0 - 87.0
Firefox ESR: 78.0 - 78.9.0, 68.0 - 68.12.0, 60.0 - 60.9.0
External links
http://www.mozilla.org/en-US/security/advisories/mfsa2021-16/
http://www.mozilla.org/en-US/security/advisories/mfsa2021-15/
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.