CVE-2021-44481
📋 TL;DR
This vulnerability in YottaDB allows attackers to trigger a NULL pointer dereference by exploiting insufficient parameter validation in memory copy operations. It affects all YottaDB users running versions through r1.32 and V7.0-000. The issue could lead to denial of service or potential information disclosure.
💻 Affected Systems
- YottaDB
📦 What is this software?
Gt.m by Fisglobal
Yottadb by Yottadb
⚠️ Risk & Real-World Impact
Worst Case
Application crash leading to denial of service, potential memory corruption enabling arbitrary code execution, or information disclosure from memory contents.
Likely Case
Application crash and denial of service when malicious input triggers the NULL pointer dereference.
If Mitigated
Minimal impact if proper input validation and error handling are implemented at application layer.
🎯 Exploit Status
Exploitation requires ability to trigger the vulnerable function with specific parameters. No public exploit code has been identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after r1.32 and V7.0-000
Vendor Advisory: https://gitlab.com/YottaDB/DB/YDB/-/issues/828
Restart Required: Yes
Instructions:
1. Upgrade YottaDB to version after r1.32 or V7.0-000. 2. Stop all YottaDB processes. 3. Install the updated version. 4. Restart YottaDB processes.
🔧 Temporary Workarounds
Input validation at application layer
allImplement strict input validation in applications using YottaDB to prevent triggering the vulnerable function with malicious parameters.
🧯 If You Can't Patch
- Implement network segmentation to isolate YottaDB instances from untrusted networks
- Deploy application-level firewalls or WAFs to filter potentially malicious inputs
🔍 How to Verify
Check if Vulnerable:
Check YottaDB version using 'ydb -version' command and compare against affected versions (r1.32 and earlier, V7.0-000 and earlier).Check Version:
ydb -versionVerify Fix Applied:
After patching, verify version is above r1.32 or V7.0-000 using 'ydb -version' command.📡 Detection & Monitoring
Log Indicators:
- Segmentation fault errors in YottaDB logs
- Unexpected process termination of YottaDB processes
- Core dumps from YottaDB processes
Network Indicators:
- Unusual patterns of requests to YottaDB services
- Multiple connection attempts followed by service disruption
SIEM Query:
source="yottadb.log" AND ("segmentation fault" OR "core dumped" OR "SIGSEGV")