SB2021101112 - Spoofing attack in LibreOffice

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Main Vulnerability Database SB2021101112

SB2021101112 - Spoofing attack in LibreOffice

Published: October 11, 2021

Security Bulletin ID SB2021101112
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper Verification of Cryptographic Signature (CVE-ID: CVE-2021-25635)

CWE-ID: CWE-347 - Improper Verification of Cryptographic Signature

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote user to perform spoofing attack.

The vulnerability exists due to application does not properly check for digital signatures of ODF files. A remote attacker can change the signature algorithm in the document to an invalid (or unknown to LibreOffice) algorithm and LibreOffice would incorrectly present such a signature with an unknown algorithm as a valid signature issued by a trusted person.


Remediation

Install update from vendor's website.

References