CVE-2022-22390 – This vulnerability in IBM Db2 allows unauthoriz... (How to Fix)

Q: What is the severity of CVE-2022-22390?

CVE-2022-22390 has a CVSS score of 7.5 (HIGH). This vulnerability in IBM Db2 allows unauthorized information disclosure through improper privilege management when using table functions. Attackers can access sensitive data they shouldn't have permission to view. Affects IBM Db2 versions 9.7, 10.1, 10.5, 11.1, and 11.5 on Linux, UNIX, and Windows systems.

📋 TL;DR

This vulnerability in IBM Db2 allows unauthorized information disclosure through improper privilege management when using table functions. Attackers can access sensitive data they shouldn't have permission to view. Affects IBM Db2 versions 9.7, 10.1, 10.5, 11.1, and 11.5 on Linux, UNIX, and Windows systems.

💻 Affected Systems

Products:

IBM Db2

Versions: 9.7, 10.1, 10.5, 11.1, 11.5

Operating Systems: Linux, UNIX, Windows

Default Config Vulnerable: ⚠️ Yes

Notes: Affects all configurations where table functions are used with improper privilege checks

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete database information disclosure including sensitive customer data, financial records, or intellectual property

🟠

Likely Case

Partial data exposure through table function misuse by authenticated users with some database access

🟢

If Mitigated

Minimal impact with proper access controls and privilege separation in place

🌐 Internet-Facing: MEDIUM - Requires database access but could be exploited if database is exposed

🏢 Internal Only: HIGH - Authenticated users can exploit this vulnerability to escalate privileges and access unauthorized data

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Requires authenticated database access and knowledge of table function usage

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Apply fixes as per IBM advisory - specific fix packs vary by version

Vendor Advisory: https://www.ibm.com/support/pages/node/6597993

Restart Required: Yes

Instructions:

1. Review IBM advisory for your Db2 version. 2. Download and apply appropriate fix pack. 3. Restart Db2 services. 4. Verify patch application.

🔧 Temporary Workarounds

Restrict table function privileges

all

Review and limit table function permissions to only necessary users

REVOKE EXECUTE ON FUNCTION function_name FROM user_or_role

Implement strict access controls

all

Enforce principle of least privilege for all database users

🧯 If You Can't Patch

Implement network segmentation to isolate Db2 servers from untrusted networks
Enable detailed auditing of table function usage and monitor for suspicious activity

🔍 How to Verify

Check if Vulnerable:

Check Db2 version against affected versions list: db2level command

Check Version:

db2level

Verify Fix Applied:

Verify applied fix pack version and check that table function privileges are properly restricted

📡 Detection & Monitoring

Log Indicators:

Unauthorized table function execution attempts
Privilege escalation patterns in audit logs

Network Indicators:

Unusual database query patterns from authenticated users

SIEM Query:

source="db2_audit.log" AND (event="EXECUTE_FUNCTION" AND user NOT IN authorized_users_list)

📊 Metadata

CVE ID: CVE-2022-22390

CVSS v3 Score: 7.5 (HIGH)

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

CWE: CWE-269

Published: June 24, 2022

Last Updated: November 21, 2024

🔗 References

https://exchange.xforce.ibmcloud.com/vulnerabilities/221973 VDB Entry,Vendor Advisory
https://security.netapp.com/advisory/ntap-20220729-0007/ Third Party Advisory
https://www.ibm.com/support/pages/node/6597993 Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/221973 VDB Entry,Vendor Advisory
https://security.netapp.com/advisory/ntap-20220729-0007/ Third Party Advisory
https://www.ibm.com/support/pages/node/6597993 Vendor Advisory

📤 Share & Export

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📦 What is this software?

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⚠️ Risk & Real-World Impact

Worst Case

Likely Case

If Mitigated

🎯 Exploit Status

🛠️ Fix & Mitigation

✅ Official Fix

Instructions:

🔧 Temporary Workarounds

Restrict table function privileges

Implement strict access controls

🧯 If You Can't Patch

🔍 How to Verify

Check if Vulnerable:

Check Version:

Verify Fix Applied:

📡 Detection & Monitoring

Log Indicators:

Network Indicators:

SIEM Query:

📊 Metadata

🔗 References

📤 Share & Export

🔗 Related Vulnerabilities