CVE-2022-31124
📋 TL;DR
This vulnerability in openssh_key_parser allows attackers to expose sensitive key field values through error messages. Attackers can manipulate declared field lengths to trigger error messages containing raw cryptographic material. Users of openssh_key_parser versions before 0.0.6 are affected.
💻 Affected Systems
- openssh_key_parser
📦 What is this software?
Openssh Key Parser by Openssh Key Parser Project
⚠️ Risk & Real-World Impact
Worst Case
Exposure of private SSH keys or other sensitive cryptographic material leading to unauthorized system access and data breaches.
Likely Case
Information disclosure of cryptographic key components that could aid in further attacks or compromise of SSH authentication.
If Mitigated
Limited impact with proper error handling and logging controls preventing exposure of sensitive data.
🎯 Exploit Status
Exploitation requires ability to modify key files or influence key parsing input. No public exploits known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.0.6
Vendor Advisory: https://github.com/scottcwang/openssh_key_parser/security/advisories/GHSA-hm37-9xh2-q499
Restart Required: No
Instructions:
1. Update openssh_key_parser: pip install --upgrade openssh_key_parser==0.0.6
2. Verify installation: pip show openssh_key_parser
3. Restart any services using the library
🔧 Temporary Workarounds
No known workarounds
allThe vulnerability is in the library's error handling logic and cannot be mitigated without patching.
🧯 If You Can't Patch
- Monitor for error messages containing sensitive data in application logs
- Restrict access to systems using vulnerable versions and implement strict input validation
🔍 How to Verify
Check if Vulnerable:
Check openssh_key_parser version: pip show openssh_key_parser | grep VersionCheck Version:
pip show openssh_key_parser | grep VersionVerify Fix Applied:
Confirm version is 0.0.6 or higher: pip show openssh_key_parser | grep Version📡 Detection & Monitoring
Log Indicators:
- Error messages containing raw cryptographic data from openssh_key_parser parsing failures
Network Indicators:
- Unusual SSH key parsing attempts or manipulation of key files
SIEM Query:
source="application_logs" AND "openssh_key_parser" AND "error" AND ("raw" OR "field" OR "value")🔗 References
- https://github.com/scottcwang/openssh_key_parser/commit/26e0a471e9fdb23e635bc3014cf4cbd2323a08d3
- https://github.com/scottcwang/openssh_key_parser/commit/274447f91b4037b7050ae634879b657554523b39
- https://github.com/scottcwang/openssh_key_parser/commit/d5b53b4b7e76c5b666fc657019dbf864fb04076c
- https://github.com/scottcwang/openssh_key_parser/pull/5
- https://github.com/scottcwang/openssh_key_parser/security/advisories/GHSA-hm37-9xh2-q499
- https://github.com/scottcwang/openssh_key_parser/commit/26e0a471e9fdb23e635bc3014cf4cbd2323a08d3
- https://github.com/scottcwang/openssh_key_parser/commit/274447f91b4037b7050ae634879b657554523b39
- https://github.com/scottcwang/openssh_key_parser/commit/d5b53b4b7e76c5b666fc657019dbf864fb04076c
- https://github.com/scottcwang/openssh_key_parser/pull/5
- https://github.com/scottcwang/openssh_key_parser/security/advisories/GHSA-hm37-9xh2-q499
