CVE-2022-26477
📋 TL;DR
CVE-2022-26477 is a resource exhaustion vulnerability in Apache SystemDS where an attacker can manipulate serialization data to cause CPU exhaustion through an infinite loop. This affects systems running vulnerable versions of Apache SystemDS that process untrusted serialized data. The vulnerability requires specific manipulation of byte streams but could lead to denial of service.
💻 Affected Systems
- Apache SystemDS
📦 What is this software?
Systemds by Apache
⚠️ Risk & Real-World Impact
Worst Case
Complete CPU exhaustion leading to denial of service, potentially affecting distributed operations in SystemDS clusters.
Likely Case
Localized performance degradation or service disruption if an attacker successfully manipulates serialized data streams.
If Mitigated
Minimal impact due to existing CRC protections in many code paths and the need for consistent byte stream manipulation.
🎯 Exploit Status
Exploitation requires modifying two entries in byte streams consistently to bypass existing bounds. No public exploits have been documented.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions higher than 2.2.1
Vendor Advisory: https://lists.apache.org/thread/r4x2d2r6d4zykdrrx6s2l4qbxgzws0z3
Restart Required: Yes
Instructions:
1. Identify current SystemDS version. 2. Upgrade to version 2.2.2 or higher. 3. Restart SystemDS services. 4. Verify the fix by checking version and testing serialization operations.
🔧 Temporary Workarounds
Restrict untrusted data sources
allLimit SystemDS to only process serialized data from trusted sources and implement input validation for serialization operations.
🧯 If You Can't Patch
- Implement strict access controls to prevent unauthorized modification of serialized data streams
- Monitor SystemDS processes for abnormal CPU usage patterns that might indicate exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check SystemDS version: if version is 2.2.1 or lower, system is vulnerable.Check Version:
Check SystemDS documentation or configuration files for version information specific to your deployment.Verify Fix Applied:
Verify SystemDS version is 2.2.2 or higher and test serialization/deserialization operations with boundary cases.📡 Detection & Monitoring
Log Indicators:
- Unusually high CPU usage by SystemDS processes
- Failed deserialization attempts
- Process timeouts during data processing
Network Indicators:
- Abnormal data stream sizes or patterns in SystemDS communications
SIEM Query:
Process monitoring for SystemDS with CPU usage >90% sustained for extended periods