What’s Vulnerable › Vulnerabilities

CVE-2022-26307: Weak Master Keys

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-07-25 · updated 2026-06-17
• Weakness: CWE-326

Description

LibreOffice supports the storage of passwords for web connections in the user’s configuration database. The stored passwords are encrypted with a single master key provided by the user. A flaw in LibreOffice existed where master key was poorly encoded resulting in weakening its entropy from 128 to 43 bits making the stored passwords vulerable to a brute force attack if an attacker has access to the users stored config. This issue affects: The Document Foundation LibreOffice 7.2 versions prior to 7.2.7; 7.3 versions prior to 7.3.3.

Affected products

• Debian Linux: 10.0
• The Document Foundation LibreOffice: from 7.2.0 before 7.2.7; from 7.3.0 before 7.3.3 — fixed in 7.2.7, 7.3.3

How to fix

Upgrade to a fixed version: The Document Foundation LibreOffice 7.2.7, 7.3.3. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2022/08/13/2
• https://lists.debian.org/debian-lts-announce/2023/03/msg00022.html
• https://www.libreoffice.org/about-us/security/advisories/cve-2022-26307
• http://www.openwall.com/lists/oss-security/2022/08/13/2
• https://lists.debian.org/debian-lts-announce/2023/03/msg00022.html
• https://www.libreoffice.org/about-us/security/advisories/cve-2022-26307

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