#VU108758 Improper verification of cryptographic signature in Poppler - CVE-2025-43903

Vulnerability identifier: #VU108758

Vulnerability risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-43903

CWE-ID: CWE-347

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Poppler
Client/Desktop applications / Office applications

Vendor: Freedesktop.org

Description

The vulnerability allows a remote attacker to perform a spoofing attack.

The vulnerability exists due to incorrect adbe.pkcs7.sha1 signature verification in NSSCryptoSignBackend.cc. A remote attacker can create a specially crafted file that bypasses signature verification process and allows to perform document forgery.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Poppler: 20.08.0 - 25.03.0

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External links
https://gitlab.freedesktop.org/poppler/poppler/-/commit/f1b9c830f145a0042e853d6462b2f9ca4016c669

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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.