#VU51661 Out-of-bounds read in Mozilla Firefox and Firefox ESR


Published: 2021-03-23 | Updated: 2021-04-08

Vulnerability identifier: #VU51661

Vulnerability risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-23981

CWE-ID: CWE-125

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 gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition during texture upload of a Pixel Buffer Object in WebGL. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 60.0 - 86.0.1

Firefox ESR: 78.0 - 78.8.0, 68.0 - 68.12.0, 60.0 - 60.9.0


CPE

External links
http://www.mozilla.org/en-US/security/advisories/mfsa2021-10/
http://www.mozilla.org/en-US/security/advisories/mfsa2021-11/


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?


Latest bulletins with this vulnerability