Debian update for firefox-esr

Published: 2022-03-07 | Updated: 2023-01-31

Risk	Critical
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2022-26485 CVE-2022-26486
CWE-ID	CWE-416
Exploitation vector	Network
Public exploit	Vulnerability #1 is being exploited in the wild. Vulnerability #2 is being exploited in the wild.
Vulnerable software Subscribe	firefox-esr (Debian package) Operating systems & Components / Operating system package or component
Vendor	Debian

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU61032

Risk: Critical

CVSSv3.1: 8.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2022-26485

CWE-ID: CWE-416 - Use After Free

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing XSLT parameter. A remote attacker can trick the victim to open a specially crafted web page, trigger a use-after-free error and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Note, the vulnerability is being actively exploited in the wild.

Mitigation

Update firefox-esr package to one of the following versions: 91.6.1esr-1~deb10u1, 91.6.1esr-1~deb11u1.

Vulnerable software versions

firefox-esr (Debian package): 60.8.0esr-1~deb10u1 - 91.6.0esr-1~deb11u1

External links

http://www.debian.org/security/2022/dsa-5090

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.

2) Use-after-free

EUVDB-ID: #VU61033