Multiple vulnerabilities in Liblouis

Published: 2022-06-13

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2022-31783 CVE-2022-26981
CWE-ID	CWE-787 CWE-119
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Liblouis Universal components / Libraries / Libraries used by multiple products
Vendor	Liblouis

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds write

EUVDB-ID: #VU64230

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-31783

CWE-ID: CWE-787 - Out-of-bounds Write

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 within the in compileRule() function in compileTranslationTable.c. A remote attacker can trick the victim to pass specially crafted data to the application, trigger an out-of-bounds write 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

Liblouis: 2.5.2 - 3.21.0

CPE2.3

cpe:2.3:a:liblouis:liblouis:3.21.0:*:*:*:*:*:*:*
Full software list in CPE2.3 format available after registration.

External links

http://github.com/liblouis/liblouis/commit/ff747ec5e1ac54d54194846f6fe5bfc689192a85
http://github.com/liblouis/liblouis/issues/1214

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) Buffer overflow

EUVDB-ID: #VU64229