#VU48471 Resource management error in Mozilla Firefox


Published: 2020-11-17

Vulnerability identifier: #VU48471

Vulnerability risk: Low

CVSSv3.1:

CVE-ID: CVE-2020-26967

CWE-ID: CWE-399

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 introduce an unexpected behavior.

The vulnerability exists due to improper management of internal resources within Mutation Observers. When listening for page changes with a Mutation Observer, a malicious web page could confuse Firefox Screenshots into interacting with elements other than those that it injected into the page. This would lead to internal errors and unexpected behavior in the Screenshots code.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 80.0 - 82.0.3


CPE

External links
http://www.mozilla.org/en-US/security/advisories/mfsa2020-50/


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?


Latest bulletins with this vulnerability