#VU56373 Input validation error


Published: 2021-09-07 | Updated: 2021-09-08

Vulnerability identifier: #VU56373

Vulnerability risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-38492

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 when delegating navigations to the operating system. Firefox accept the mk scheme, which allows a remote attacker to launch pages and execute scripts in Internet Explorer in unprivileged mode.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 60.0 - 91.0.2

Firefox ESR: 91.0 - 91.0.1, 78.0 - 78.13.0, 68.0 - 68.12.0, 60.0 - 60.9.0


CPE

External links
http://www.mozilla.org/en-US/security/advisories/mfsa2021-38/
http://www.mozilla.org/en-US/security/advisories/mfsa2021-39/
http://www.mozilla.org/en-US/security/advisories/mfsa2021-40/


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?


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