SB2025121314 - Ubuntu update for fonttools

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2025121314

SB2025121314 - Ubuntu update for fonttools

Published: December 13, 2025

Security Bulletin ID SB2025121314
Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

High 50% Medium 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) XML External Entity injection (CVE-ID: CVE-2023-45139)

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to insufficient validation of user-supplied XML input when parsing SVG table. A remote attacker can pass a specially crafted XML code to the affected application and view contents of arbitrary files on the system or initiate requests to external systems.

Successful exploitation of the vulnerability may allow an attacker to view contents of arbitrary file on the server or perform network scanning of internal and external infrastructure.


2) Path traversal (CVE-ID: CVE-2025-66034)

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to input validation error when processing .designspace files in fontTools.varLib. A remote attacker can trick the victim into passing a specially crafted file and overwrite arbitrary files on the system.


Remediation

Install update from vendor's website.

References