CVE-2021-44486
📋 TL;DR
This vulnerability allows attackers to execute arbitrary code by manipulating a function pointer in YottaDB's op_write function. Attackers can gain control of execution flow through crafted input, potentially leading to remote code execution. All users of YottaDB through r1.32 and V7.0-000 are affected.
💻 Affected Systems
- YottaDB
📦 What is this software?
Gt.m by Fisglobal
Yottadb by Yottadb
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with full system compromise, allowing attackers to install malware, exfiltrate data, or pivot to other systems.
Likely Case
Application compromise leading to data manipulation, denial of service, or privilege escalation within the YottaDB environment.
If Mitigated
Limited impact if proper network segmentation and least privilege access controls are implemented, potentially containing the exploit to the database layer.
🎯 Exploit Status
Exploitation requires crafting specific input to manipulate the function pointer, but no authentication is needed if the vulnerable service is exposed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 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 the patched version from YottaDB's official repository. 2. Stop all YottaDB processes. 3. Install the updated version following YottaDB's installation guide. 4. Restart YottaDB services.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict network access to YottaDB instances to only trusted hosts and networks.
Use firewall rules (e.g., iptables -A INPUT -p tcp --dport <YottaDB_port> -s <trusted_ip> -j ACCEPT)
🧯 If You Can't Patch
- Implement strict input validation and sanitization for all data processed by YottaDB.
- Deploy network segmentation to isolate YottaDB instances from untrusted networks and critical systems.
🔍 How to Verify
Check if Vulnerable:
Check YottaDB version with 'ydb -version' and compare against affected versions (r1.32 and earlier, V7.0-000).Check Version:
ydb -versionVerify Fix Applied:
Verify version is r1.34 or later, or V7.0-001 or later using 'ydb -version'.📡 Detection & Monitoring
Log Indicators:
- Unusual op_write function calls
- Abnormal process crashes in YottaDB
- Suspicious input patterns in database logs
Network Indicators:
- Unexpected connections to YottaDB ports from untrusted sources
- Anomalous network traffic patterns to database instances
SIEM Query:
source="yottadb.log" AND ("op_write" OR "segmentation fault" OR "access violation")