Weak Master Keys
CVE-2022-26307

8.8HIGH

Key Information:

Vendor

The Document Foundation

Status
Libreoffice
Vendor
CVE Published:
25 July 2022

What is CVE-2022-26307?

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.

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Affected Version(s)

LibreOffice 7.2 < 7.2.7

LibreOffice 7.3 < 7.3.3

References

https://www.libreoffice.org/about-us/security/advisories/...
http://www.openwall.com/lists/oss-security/2022/08/13/2
mailing-list
https://lists.debian.org/debian-lts-announce/2023/03/msg0...
mailing-list

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

OpenSource Security GmbH on behalf of the German Federal Office for Information Security
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