1. Introduction
Ivanti Policy Secure is a VPN solution affected by an authentication bypass vulnerability. This allows attackers to gain access to restricted resources without valid credentials, potentially compromising sensitive data and systems. Systems running Ivanti Policy Secure 9.x or 22.x are at risk. A successful exploit could lead to confidentiality, integrity, and availability loss.
2. Technical Explanation
The vulnerability resides in the web component of Ivanti Policy Secure versions 9.x and 22.x. It’s caused by insufficient control checks during authentication, allowing attackers to bypass security measures. An attacker can exploit this remotely to access restricted resources. The vulnerability is tracked as CVE-2023-46805.
- Root cause: Insufficient control checks in the web component of Ivanti Policy Secure versions 9.x and 22.x during authentication processes.
- Exploit mechanism: An attacker can send a crafted request to bypass authentication controls, gaining access to restricted resources.
- Scope: Ivanti Policy Secure versions 9.x and 22.x are affected.
3. Detection and Assessment
To confirm vulnerability, check the installed version of Ivanti Policy Secure. A thorough method involves reviewing logs for suspicious authentication attempts.
- Quick checks: Check the product version via the web interface or command line (if available).
- Scanning: Nessus scan with ID 11330e19 can identify vulnerable systems. This is an example only.
- Logs and evidence: Review Ivanti Policy Secure logs for unusual authentication patterns or failed login attempts followed by successful access without valid credentials.
4. Solution / Remediation Steps
Apply the vendor-provided patch for Ivanti Policy Secure to address this vulnerability.
4.1 Preparation
- A change window may be required, and approval from security or IT management is recommended.
4.2 Implementation
- Step 1: Download the latest patch for Ivanti Policy Secure from the vendor’s website.
- Step 2: Install the downloaded patch on the affected system.
4.3 Config or Code Example
Before
After
4.4 Security Practices Relevant to This Vulnerability
Implementing least privilege and regularly patching systems are crucial for mitigating this vulnerability.
- Practice 1: Least privilege reduces the impact if an attacker gains unauthorized access.
- Practice 2: A regular patch cadence ensures timely application of security updates, preventing exploitation of known vulnerabilities.
4.5 Automation (Optional)
5. Verification / Validation
Confirm the patch installation by checking the updated version of Ivanti Policy Secure. Re-run detection methods to verify the vulnerability is resolved.
- Post-fix check: Verify the installed version via the web interface or command line, confirming it’s a patched version.
- Re-test: Run the Nessus scan (ID 11330e19) again to confirm the vulnerability is no longer detected.
- Monitoring: Monitor Ivanti Policy Secure logs for any unusual authentication attempts or errors following the patch installation.
6. Preventive Measures and Monitoring
Update security baselines to include patched versions of Ivanti Policy Secure, and incorporate vulnerability scanning into CI/CD pipelines.
- Baselines: Update your security baseline or policy to require the latest patched version of Ivanti Policy Secure.
- Asset and patch process: Implement a regular patch review cycle for all critical systems, including Ivanti Policy Secure.
7. Risks, Side Effects, and Roll Back
Patching may cause temporary service disruption. A rollback plan involving restoring from the pre-patch backup is essential.
- Risk or side effect 1: Patch installation could temporarily disrupt VPN connectivity.
- Risk or side effect 2: Compatibility issues with other systems are possible, though unlikely.
8. References and Resources
- Vendor advisory or bulletin: https://www.ivanti.com/security-advisories
- NVD or CVE entry: https://nvd.nist.gov/vuln/detail/CVE-2023-46805
- Product or platform documentation relevant to the fix: https://community.ivanti.com/