CVE-2025-8837
📋 TL;DR
This CVE describes a use-after-free vulnerability in JasPer's JPEG2000 file handler that could allow local attackers to execute arbitrary code or cause denial of service. The vulnerability affects systems running JasPer up to version 4.2.5 when processing malicious JPEG2000 files. Attackers need local access to exploit this vulnerability.
💻 Affected Systems
- JasPer
📦 What is this software?
Jasper by Jasper Project
⚠️ Risk & Real-World Impact
Worst Case
Local privilege escalation leading to full system compromise, arbitrary code execution, or persistent backdoor installation.
Likely Case
Application crash (denial of service) or limited information disclosure from memory corruption.
If Mitigated
Minimal impact with proper access controls and sandboxing preventing local attackers from reaching vulnerable components.
🎯 Exploit Status
Exploit has been publicly disclosed and requires local access. Attackers need to craft malicious JPEG2000 files and trigger the vulnerable function.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after commit 8308060d3fbc1da10353ac8a95c8ea60eba9c25a
Vendor Advisory: https://github.com/jasper-software/jasper/commit/8308060d3fbc1da10353ac8a95c8ea60eba9c25a
Restart Required: No
Instructions:
1. Update JasPer to version after commit 8308060d3fbc1da10353ac8a95c8ea60eba9c25a. 2. Recompile any applications using JasPer library. 3. Test JPEG2000 processing functionality.
🔧 Temporary Workarounds
Disable JPEG2000 processing
allTemporarily disable or restrict JPEG2000 file processing in applications using JasPer
Restrict file uploads
allBlock JPEG2000 file uploads or processing in web applications
🧯 If You Can't Patch
- Implement strict access controls to limit local user privileges
- Sandbox applications using JasPer to contain potential exploitation
🔍 How to Verify
Check if Vulnerable:
Check JasPer version with 'jasper --version' or examine installed package version. Versions <= 4.2.5 are vulnerable.Check Version:
jasper --versionVerify Fix Applied:
Verify JasPer version is > 4.2.5 or includes commit 8308060d3fbc1da10353ac8a95c8ea60eba9c25a. Test with known malicious JPEG2000 files.📡 Detection & Monitoring
Log Indicators:
- Application crashes when processing JPEG2000 files
- Memory access violation errors in application logs
- Unexpected process termination of JasPer-related services
Network Indicators:
- Local file transfer of JPEG2000 files to vulnerable systems
SIEM Query:
Process:Name="jasper" AND EventID=1000 OR Application crashes with memory access violations🔗 References
- https://drive.google.com/file/d/17Ic_DDOlH7mMT7IbTN2Bmo6SrujIUh24/view?usp=sharing
- https://github.com/jasper-software/jasper/commit/8308060d3fbc1da10353ac8a95c8ea60eba9c25a
- https://github.com/jasper-software/jasper/issues/402
- https://vuldb.com/?ctiid.319371
- https://vuldb.com/?id.319371
- https://vuldb.com/?submit.630487
- https://vuldb.com/?submit.630488
- https://github.com/jasper-software/jasper/issues/402
- https://vuldb.com/?submit.630488
