CVE-2021-44490
📋 TL;DR
This vulnerability allows attackers to cause a denial-of-service (DoS) by crashing YottaDB applications through crafted input that triggers an integer miscalculation in memory allocation. Attackers can exploit this to cause segmentation faults and application crashes. Affected users include anyone running vulnerable versions of YottaDB or V7.0-000.
💻 Affected Systems
- YottaDB
- V7.0-000
📦 What is this software?
Gt.m by Fisglobal
Yottadb by Yottadb
⚠️ Risk & Real-World Impact
Worst Case
Complete service disruption through application crashes, potentially affecting database availability and dependent applications.
Likely Case
Denial-of-service through application crashes, requiring restart of affected YottaDB processes.
If Mitigated
Limited impact if proper input validation and access controls prevent malicious input from reaching vulnerable code.
🎯 Exploit Status
Exploitation requires sending crafted input to trigger the vulnerable code path, but no public exploit code is known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: YottaDB r1.34 and later, V7.0-001 and later
Vendor Advisory: https://gitlab.com/YottaDB/DB/YDB/-/issues/828
Restart Required: Yes
Instructions:
1. Download latest YottaDB release from official repository. 2. Follow installation instructions for your platform. 3. Restart all YottaDB processes and dependent applications.
🔧 Temporary Workarounds
Input validation
allImplement strict input validation to prevent crafted input from reaching the vulnerable op_fnj3 function.
Access controls
allRestrict access to YottaDB applications to trusted users only.
🧯 If You Can't Patch
- Implement network segmentation to isolate YottaDB systems from untrusted networks
- Deploy application-level firewalls or WAFs to filter suspicious input patterns
🔍 How to Verify
Check if Vulnerable:
Check YottaDB version: yottadb -version | grep 'YottaDB release'Check Version:
yottadb -versionVerify Fix Applied:
Verify version is r1.34+ or V7.0-001+ after patching📡 Detection & Monitoring
Log Indicators:
- Segmentation fault errors in application logs
- Unexpected YottaDB process crashes
- Core dump files in working directories
Network Indicators:
- Unusual input patterns to YottaDB applications
- Sudden loss of database connectivity
SIEM Query:
source="yottadb.log" AND ("segmentation fault" OR "SIGSEGV" OR "core dumped")