Ubuntu update for poppler

1) Improper verification of cryptographic signature

EUVDB-ID: #VU108758

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 - Improper Verification of Cryptographic Signature

Exploit availability: No

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

Update the affected package poppler to the latest version.

Vulnerable software versions

Ubuntu: 18.04 - 25.04

libpoppler97 (Ubuntu package): before 0.86.1-0ubuntu1.7

libpoppler118 (Ubuntu package): before 22.02.0-2ubuntu0.8

libpoppler134 (Ubuntu package): before 24.02.0-1ubuntu9.4

libpoppler140 (Ubuntu package): before 24.08.0-1ubuntu0.3

poppler-utils (Ubuntu package): before 0.86.1-0ubuntu1.7

libpoppler147 (Ubuntu package): before 25.03.0-3ubuntu1

libpoppler73 (Ubuntu package): before Ubuntu Pro

CPE2.3

• cpe:2.3:o:canonical:ubuntu:18.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:20.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:22.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:24.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:24.10:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:25.04:*:*:*:*:*:*:*
• cpe:2.3:a:canonical:libpoppler97:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:libpoppler118_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:libpoppler134_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:libpoppler140_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:poppler-utils_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:libpoppler147_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:libpoppler73_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-7471-1

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.