Vulnerability identifier: #VU27530
Vulnerability risk: High
CVSSv4.0: 7.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]
CVE-ID:
CWE-ID:
CWE-264
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 bypass sandbox restrictions.
The vulnerability exists due the Firefox content processes did not sufficiently lockdown access control due to improper protection of access tokens. A remote attacker can bypass implemented security restrictions and execute arbitrary code on the target system.
Note, this vulnerability affects Windows versions only.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Mozilla Firefox: 60.0 - 75.0
Firefox ESR: 60.0 - 60.9.0, 68.0 - 68.7.0
External links
https://www.mozilla.org/en-US/security/advisories/mfsa2020-16/
https://www.mozilla.org/en-US/security/advisories/mfsa2020-17/
https://bugzilla.mozilla.org/show_bug.cgi?id=1618911
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.