CVE-2015-0243
📋 TL;DR
This vulnerability in PostgreSQL's pgcrypto extension allows remote authenticated users to trigger buffer overflows, potentially causing denial of service (crash) or arbitrary code execution. It affects PostgreSQL versions before 9.0.19, 9.1.15, 9.2.10, 9.3.6, and 9.4.1. Only systems with the pgcrypto extension enabled and accessible to authenticated users are vulnerable.
💻 Affected Systems
- PostgreSQL
📦 What is this software?
Postgresql by Postgresql
Postgresql by Postgresql
Postgresql by Postgresql
Postgresql by Postgresql
Postgresql by Postgresql
⚠️ Risk & Real-World Impact
Worst Case
Remote authenticated attacker gains full control of the PostgreSQL server, potentially leading to database compromise, data exfiltration, and lateral movement within the network.
Likely Case
Denial of service causing PostgreSQL crashes and service disruption, with potential for limited code execution depending on exploit sophistication.
If Mitigated
Minimal impact if proper network segmentation and authentication controls prevent unauthorized access to PostgreSQL services.
🎯 Exploit Status
Requires authenticated access to PostgreSQL. The 'unspecified vectors' in the description suggest multiple potential exploitation paths within pgcrypto functions.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 9.0.19, 9.1.15, 9.2.10, 9.3.6, or 9.4.1 depending on your version
Vendor Advisory: http://www.postgresql.org/about/news/1569/
Restart Required: Yes
Instructions:
1. Identify your PostgreSQL version. 2. Backup your database. 3. Upgrade to the patched version for your release series. 4. Restart PostgreSQL service. 5. Verify the upgrade was successful.
🔧 Temporary Workarounds
Disable pgcrypto extension
allRemove or disable the vulnerable pgcrypto extension if not required
DROP EXTENSION IF EXISTS pgcrypto;
Restrict network access
allLimit PostgreSQL access to trusted networks only
Edit pg_hba.conf to restrict connections
Configure firewall rules to block unauthorized access
🧯 If You Can't Patch
- Implement strict network segmentation to isolate PostgreSQL servers
- Enforce strong authentication and limit user privileges to minimum required
🔍 How to Verify
Check if Vulnerable:
Check PostgreSQL version and if pgcrypto extension is installed: SELECT version(); and SELECT * FROM pg_extension WHERE extname = 'pgcrypto';Check Version:
SELECT version();Verify Fix Applied:
Confirm version is patched: SELECT version(); should show 9.0.19, 9.1.15, 9.2.10, 9.3.6, or 9.4.1 or higher📡 Detection & Monitoring
Log Indicators:
- PostgreSQL crash logs
- Unexpected connection attempts to pgcrypto functions
- Authentication failures followed by crash
Network Indicators:
- Unusual traffic patterns to PostgreSQL port 5432
- Multiple connection attempts from single source
SIEM Query:
source="postgresql.log" AND ("crash" OR "segmentation fault" OR "buffer overflow")🔗 References
- http://www.debian.org/security/2015/dsa-3155
- http://www.postgresql.org/about/news/1569/
- http://www.postgresql.org/docs/9.4/static/release-9-4-1.html
- http://www.postgresql.org/docs/current/static/release-9-0-19.html
- http://www.postgresql.org/docs/current/static/release-9-1-15.html
- http://www.postgresql.org/docs/current/static/release-9-2-10.html
- http://www.postgresql.org/docs/current/static/release-9-3-6.html
- http://www.debian.org/security/2015/dsa-3155
- http://www.postgresql.org/about/news/1569/
- http://www.postgresql.org/docs/9.4/static/release-9-4-1.html
- http://www.postgresql.org/docs/current/static/release-9-0-19.html
- http://www.postgresql.org/docs/current/static/release-9-1-15.html
- http://www.postgresql.org/docs/current/static/release-9-2-10.html
- http://www.postgresql.org/docs/current/static/release-9-3-6.html
