Vulnerability identifier: #VU61104

Vulnerability risk: Medium

CVSSv3.1:

CVE-ID: CVE-2022-26387

CWE-ID: CWE-367

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 perform spoofing attack.

The vulnerability exists due to a race condition when verifying signatures during Firefox add-on installation. A remote attacker can replace the underlying add-on file while the user was confirming the prompt and install a malicious add-on on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 90.0 - 97.0.2

Firefox ESR: 91.0 - 91.6.1

---

CPE

• cpe:2.3:a:mozilla:mozilla_firefox:97.0.2:*:*:*:*:*:*:*

External links
http://www.mozilla.org/en-US/security/advisories/mfsa2022-10/
http://www.mozilla.org/en-US/security/advisories/mfsa2022-11/

---

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?