#VU64230 Out-of-bounds write in Liblouis - CVE-2022-31783

Vulnerability identifier: #VU64230

Vulnerability 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: CVE-2022-31783

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Liblouis
Universal components / Libraries / Libraries used by multiple products

Vendor: Liblouis

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

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External links
https://github.com/liblouis/liblouis/commit/ff747ec5e1ac54d54194846f6fe5bfc689192a85
https://github.com/liblouis/liblouis/issues/1214

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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.