#VU63900 Buffer overflow in LibreCAD - CVE-2021-45342

Vulnerability identifier: #VU63900

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-2021-45342

CWE-ID: CWE-120

Exploitation vector: Network

Exploit availability: No

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

Vendor: LibreCad

Description

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

The vulnerability exists due to a boundary error in the CDataList of the jwwlib component. A remote attacker can trick the victim into opening a specially crafted JWW document, trigger heap buffer overflow, and execute arbitrary code on the target system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

LibreCAD: 1.0.0 rc1 - 2.2.0 rc3

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External links
https://github.com/LibreCAD/LibreCAD/issues/1464
https://github.com/LibreCAD/LibreCAD/commit/e6a8fffef9b2242213ed05a3c29a9756c6a1233f

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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.