#VU65760 Improper Certificate Validation in LibreOffice - CVE-2022-26305

Vulnerability identifier: #VU65760

Vulnerability risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-26305

CWE-ID: CWE-295

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
LibreOffice
Client/Desktop applications / Office applications

Vendor: LibreOffice

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to improper certificate validation when checking signed macro attached to the document. A remote attacker can trick the victim to open a specially crafted file, bypass implemented security restrictions and execute arbitrary code on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

LibreOffice: before 7.2.7.1, 7.3.2.1, 7.2.7.1, 7.2.7.1

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External links
https://www.libreoffice.org/about-us/security/advisories/cve-2022-26305/

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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.