SB2021101112 - Spoofing attack in LibreOffice
Published: October 11, 2021
Security Bulletin ID
SB2021101112
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper Verification of Cryptographic Signature (CVE-ID: CVE-2021-25635)
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.