CVE-2013-2095
📋 TL;DR
CVE-2013-2095 is a command injection vulnerability in the rubygem-openshift-origin-controller API that allows attackers to execute arbitrary commands on the server. The vulnerability occurs through improper input validation in cartridge_cache.rb's URI.parse() function when creating applications. This affects OpenShift Origin deployments using vulnerable versions of the controller gem.
💻 Affected Systems
- rubygem-openshift-origin-controller
- OpenShift Origin
📦 What is this software?
Openshift Origin Controller by Openshift Origin Controller Project
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing remote code execution with root privileges, enabling data theft, service disruption, and lateral movement within the infrastructure.
Likely Case
Remote code execution leading to application compromise, data exfiltration, and potential privilege escalation within the OpenShift environment.
If Mitigated
Limited impact with proper network segmentation and least privilege principles, potentially only affecting isolated containers.
🎯 Exploit Status
Exploitation requires API access but the vulnerability is straightforward to exploit once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.16.1.5 and later
Vendor Advisory: https://access.redhat.com/security/cve/cve-2013-2095
Restart Required: Yes
Instructions:
1. Update rubygem-openshift-origin-controller to version 1.16.1.5 or later using 'gem update rubygem-openshift-origin-controller'. 2. Restart OpenShift Origin services. 3. Verify the fix by checking the gem version.
🔧 Temporary Workarounds
Input Validation Filter
allImplement strict input validation for API parameters before they reach the vulnerable URI.parse() function.
# Add input validation in application code before calling vulnerable functions
# Example: validate and sanitize all user-provided URI parameters
Network Segmentation
linuxRestrict API access to trusted networks only using firewall rules.
iptables -A INPUT -p tcp --dport <api_port> -s <trusted_network> -j ACCEPT
iptables -A INPUT -p tcp --dport <api_port> -j DROP
🧯 If You Can't Patch
- Implement strict network access controls to limit API exposure to only necessary users and systems.
- Deploy web application firewall (WAF) rules to detect and block command injection attempts in API requests.
🔍 How to Verify
Check if Vulnerable:
Check the installed version of rubygem-openshift-origin-controller: 'gem list | grep openshift-origin-controller'Check Version:
gem list | grep openshift-origin-controllerVerify Fix Applied:
Verify the gem version is 1.16.1.5 or higher: 'gem list | grep openshift-origin-controller' and confirm version >= 1.16.1.5📡 Detection & Monitoring
Log Indicators:
- Unusual API requests with shell metacharacters in parameters
- Failed authentication attempts followed by API exploitation attempts
- Commands executed from OpenShift controller processes
Network Indicators:
- API requests containing shell commands or special characters in URI parameters
- Outbound connections from OpenShift controller to unexpected destinations
SIEM Query:
source="openshift-controller.log" AND ("URI.parse" OR "cartridge_cache" OR "|" OR ";" OR "$" OR "`" OR "(")