Denial of service in Artifex MuJS

Published: 2022-11-29

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2022-30974 CVE-2022-30975
CWE-ID	CWE-674 CWE-476
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Mujs /
Vendor	Artifex Software, Inc.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Uncontrolled Recursion

EUVDB-ID: #VU69665

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-30974

CWE-ID: CWE-674 - Uncontrolled Recursion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a regular expression denial of service (DoS) attack.

The vulnerability exists due to unlimited recursion within the compile() function in regexp.cc. A remote attacker can pass a specially crafted string to the application and consume all available CPU resources on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Mujs: 1.0.0 - 1.2.0

External links

http://github.com/ccxvii/mujs/issues/162

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?

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

2) NULL pointer dereference

EUVDB-ID: #VU69666

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-30975

CWE-ID: CWE-476 - NULL Pointer Dereference