Improper Verification of Cryptographic Signature vulnerability in LibreOffice allows PDF Signature Spoofing by Improper Validation. In the affected versions of LibreOffice a flaw in the verification code for adbe.pkcs7.sha1 signatures could cause invalid signatures to be accepted as valid This issue affects LibreOffice: from 24.8 before < 24.8.6, from 25.2 before < 25.2.2.

The remote Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 host has packages installed that are affected by a vulnerability as referenced in the USN-7504-1 advisory.

    Juraj arinay discovered that LibreOffice incorrectly handled verifying PDF signatures. A remote attacker     could possibly use this issue to generate PDF files that appear to have a valid signature.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of LibreOffice installed on the remote host is prior to 24.8.6 or 25.2.2. It is, therefore, affected by a PDF signature spoofing vulnerability:

  - Improper Verification of Cryptographic Signature vulnerability in LibreOffice allows PDF Signature Spoofing by     Improper Validation. In the affected versions of LibreOffice a flaw in the verification code for adbe.pkcs7.sha1     signatures could cause invalid signatures to be accepted as valid This issue affects LibreOffice: from 24.8 before     < 24.8.6, from 25.2 before < 25.2.2.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Debian 12 host has packages installed that are affected by a vulnerability as referenced in the dsa-5908 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-5908-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     April 28, 2025                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : libreoffice     CVE ID         : CVE-2025-2866

    Juray Sarinay discovered that PDF documents signed with the     adbe.pkcs7.sha1 standard were incompletely validated by LibreOffice,     which could cause invalid signatures to be accepted as legitimate.

    For the stable distribution (bookworm), this problem has been fixed in     version 4:7.4.7-1+deb12u8.

    We recommend that you upgrade your libreoffice packages.

    For the detailed security status of libreoffice please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/libreoffice

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
235613	Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 : LibreOffice vulnerability (USN-7504-1)	Nessus	Ubuntu Local Security Checks	low
235031	LibreOffice 24.8.x < 24.8.6 / 25.2.x < 25.2.2 (CVE-2025-2866)	Nessus	Misc.	medium
234915	Debian dsa-5908 : fonts-opensymbol - security update	Nessus	Debian Local Security Checks	low

Detections

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CVE-2025-2866

low

Tenable Plugins

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medium

low