Ubuntu users alert: CVE-2025-31162/3 exploits in Fig2dev can cause denial-of-service attacks. Learn patching steps, affected versions (18.04-24.10), and how Ubuntu Pro extends security coverage for 25k+ packages.
Overview: High-Risk Fig2dev Flaws Demand Immediate Action
Security researchers have uncovered six critical vulnerabilities in Fig2dev, a core tool for creating TeX-compatible graphics.
These flaws (CVE-2025-31162 to CVE-2020-21680) enable denial-of-service (DoS) attacks via malicious files, posing risks to Ubuntu LTS users and enterprise systems relying on technical documentation pipelines.
🔍 Key Vulnerabilities Breakdown
Memory Handling Failures (CVE-2020-21680/82/83)
Impact: Ubuntu 18.04/20.04 LTS systems
Risk: Crafted files trigger crashes via improper memory operations
Input Size Exploits (CVE-2025-31162/3)
Impact: All Ubuntu versions
Risk: Unbounded inputs allow resource exhaustion attacks
Undisclosed Zero-Day (CVE-2025-31164)
Severity: Under active investigation
🚨 Urgent Update Instructions for Ubuntu Systems
Affected Packages:
| Ubuntu Version | Patch Version |
|---|---|
| 24.10 (Oracular) | fig2dev 3.2.9-4ubuntu0.1 |
| 20.04 (Focal) | fig2dev 3.2.7a-7ubuntu0.1+esm1 |
Action Steps:
Run
sudo apt update && sudo apt upgrade fig2devEnterprise Users: Activate Ubuntu Pro for extended 10-year security coverage (free for ≤5 machines)
💡 Why This Matters: Unpatched systems risk disruption in LaTeX/technical publishing workflows—critical for academia, R&D, and cloud infrastructure.
🛡️ Mitigation Strategies Beyond Patching
Sandboxing: Isolate Fig2dev processes using
firejailor Docker
Network Policies: Restrict file uploads to trusted sources
Monitoring: Deploy intrusion detection for abnormal memory spikes
📌 Frequently Asked Questions
Q: Is Ubuntu 22.04 LTS affected?
A: Yes—update to fig2dev 3.2.8b-1ubuntu0.1~esm1 immediately.
Q: Can these CVEs lead to RCE?
A: Current analysis suggests DoS-only impact, but exploit chains remain possible.
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