Remote code execution in Mozilla Firefox and Firefox ESR

1) Buffer overflow

EUVDB-ID: #VU50378

Risk: High

CVSSv4.0: 6.1 [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:U/U:Amber]

CVE-ID: N/A

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error withing the Angle graphics library when calculating depth pitch for compressed textures. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 60.0 - 85.0

Firefox ESR: 60.0 - 78.7.0

CPE2.3

• cpe:2.3:a:mozilla:mozilla_firefox:60.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:mozilla_firefox:60.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:mozilla_firefox:60.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox_esr:60.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox_esr:60.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox_esr:60.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox_esr:60.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox_esr:60.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox_esr:60.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox_esr:60.2.2:*:*:*:*:*:*:*

External links

https://www.mozilla.org/en-US/security/advisories/mfsa2021-06/
https://bugzilla.mozilla.org/show_bug.cgi?id=1676636

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.