Security restrictions bypass in LibreOffice

1) Improper Certificate Validation

EUVDB-ID: #VU65760

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 - Improper Certificate Validation

Exploit availability: No

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

CPE2.3

• cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:*

External links

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

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open a file.

Is there known malware, which exploits this vulnerability?

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