CVE-2021-44510 – CVE-2021-44510 is a buffer overflow vulnerabili... (How to Fix)

Q: What is the severity of CVE-2021-44510?

CVE-2021-44510 has a CVSS score of 7.5 (HIGH). CVE-2021-44510 is a buffer overflow vulnerability in FIS GT.M (and related YottaDB) where crafted input causes an extremely large memset calculation, leading to segmentation faults and application crashes. This affects all users of GT.M through V7.0-000. Attackers can exploit this to cause denial of service.

📋 TL;DR

CVE-2021-44510 is a buffer overflow vulnerability in FIS GT.M (and related YottaDB) where crafted input causes an extremely large memset calculation, leading to segmentation faults and application crashes. This affects all users of GT.M through V7.0-000. Attackers can exploit this to cause denial of service.

💻 Affected Systems

Products:

FIS GT.M
YottaDB

Versions: All versions through V7.0-000

Operating Systems: All supported platforms (Linux, UNIX variants)

Default Config Vulnerable: ⚠️ Yes

Notes: Affects the op_fnj3 function in sr_port/op_fnj3.c. All standard installations are vulnerable.

📦 What is this software?

Gt.m by Fisglobal

View all CVEs affecting Gt.m →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete application crash leading to denial of service for critical database operations, potentially disrupting business processes that rely on GT.M/YottaDB.

🟠

Likely Case

Application crashes causing temporary service disruption until restart, with potential data corruption if crashes occur during transactions.

🟢

If Mitigated

Limited impact with proper input validation and monitoring, though crashes may still occur from malicious inputs.

🌐 Internet-Facing: MEDIUM - While the vulnerability requires specific crafted input, internet-facing GT.M instances could be targeted for DoS attacks.

🏢 Internal Only: MEDIUM - Internal attackers or compromised systems could exploit this to disrupt database operations.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ⚠️ Yes

Complexity: MEDIUM

Exploitation requires crafting specific input to trigger the vulnerable memset calculation. No public exploit code has been documented.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: V7.0-002 and later

Vendor Advisory: http://tinco.pair.com/bhaskar/gtm/doc/articles/GTM_V7.0-002_Release_Notes.html

Restart Required: Yes

Instructions:

1. Download GT.M V7.0-002 or later from official sources. 2. Backup current installation and data. 3. Install the updated version following vendor documentation. 4. Restart all GT.M/YottaDB processes.

🔧 Temporary Workarounds

Input Validation Filtering

all

Implement application-level input validation to filter potentially malicious inputs before they reach the vulnerable op_fnj3 function.

🧯 If You Can't Patch

Implement network segmentation to restrict access to GT.M/YottaDB instances only to trusted systems.
Deploy application firewalls or WAF rules to detect and block suspicious input patterns targeting the vulnerable function.

🔍 How to Verify

Check if Vulnerable:

Check GT.M version with: gtm -version | head -1. If output shows V7.0-000 or earlier, system is vulnerable.

Check Version:

gtm -version | head -1

Verify Fix Applied:

After patching, verify version shows V7.0-002 or later with: gtm -version | head -1

📡 Detection & Monitoring

Log Indicators:

Segmentation fault errors in application logs
Unexpected process termination of GT.M/YottaDB processes
Core dump files generated

Network Indicators:

Unusual input patterns to GT.M/YottaDB services
Multiple connection attempts with malformed data

SIEM Query:

process_name:"gtm" AND (event_type:"segmentation_fault" OR exit_code:139)

📊 Metadata

CVE ID: CVE-2021-44510

CVSS v3 Score: 7.5 (HIGH)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE: CWE-131

Published: April 15, 2022

Last Updated: November 21, 2024

🔗 References

http://tinco.pair.com/bhaskar/gtm/doc/articles/GTM_V7.0-002_Release_Notes.html Release Notes,Third Party Advisory
https://gitlab.com/YottaDB/DB/YDB/-/issues/828 Issue Tracking,Patch,Third Party Advisory
https://sourceforge.net/projects/fis-gtm/files/ Product,Third Party Advisory
http://tinco.pair.com/bhaskar/gtm/doc/articles/GTM_V7.0-002_Release_Notes.html Release Notes,Third Party Advisory
https://gitlab.com/YottaDB/DB/YDB/-/issues/828 Issue Tracking,Patch,Third Party Advisory
https://sourceforge.net/projects/fis-gtm/files/ Product,Third Party Advisory

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🔗 Related Vulnerabilities

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