1. Introduction
IBM WebSphere Portal is affected by a denial of service vulnerability. This means an attacker could crash the application, making it unavailable to legitimate users. Systems running IBM WebSphere Portal are typically affected, potentially impacting business services that rely on the portal for operation. A successful exploit may result in temporary loss of availability.
2. Technical Explanation
The vulnerability is due to improper handling of requests by the Oracle Outside In Technology component within IBM WebSphere Portal. An attacker can send a specially crafted request that causes the application to crash, leading to a denial-of-service condition. The CVE for this issue is CVE-2013-5879. A realistic example would involve sending a malicious TIFF image file through a portal feature that processes images using Outside In Technology.
- Root cause: The version of IBM WebSphere Portal uses an outdated and vulnerable version of the Oracle Outside In Technology component, lacking critical security patches.
- Exploit mechanism: An attacker sends a crafted TIFF image file to a web server running the affected application. This triggers a buffer overflow or other memory corruption issue within the Outside In library.
- Scope: Affected versions of IBM WebSphere Portal using the Oracle Outside In Technology component are in scope.
3. Detection and Assessment
To confirm vulnerability, check the version of IBM WebSphere Portal installed. Scanning tools can also identify this issue. Review application logs for errors related to the Oracle Outside In library.
- Quick checks: Check the IBM WebSphere Portal version via the administrative console or by examining deployment descriptors.
- Scanning: Nessus vulnerability ID 265ef7be may detect this vulnerability. This is an example only, and results should be verified.
- Logs and evidence: Look for errors related to Oracle Outside In Technology in application logs (e.g., SystemOut.log).
4. Solution / Remediation Steps
Apply IBM’s interim fix PI10280, which is included in 8.0.0.1 CF10 (PI08371). This will update the Oracle Outside In Technology component to a secure version.
4.1 Preparation
- Ensure you have sufficient disk space for the fix installation. A roll back plan involves restoring from backup or reverting to a previous snapshot.
- A change window may be needed, and approval from system owners is recommended.
4.2 Implementation
- Step 1: Download interim fix PI10280 from IBM Support.
- Step 2: Apply the fix using the WebSphere Portal Installation Manager or wsadmin commands.
4.3 Config or Code Example
Before
After
4.4 Security Practices Relevant to This Vulnerability
Patch management is crucial for addressing vulnerabilities like this one. Keeping software up-to-date reduces the risk of exploitation. Least privilege can limit the impact if an attacker gains access.
- Practice 1: Implement a regular patch cadence to apply security updates promptly.
- Practice 2: Use least privilege principles to restrict user and service account permissions.
4.5 Automation (Optional)
5. Verification / Validation
- Post-fix check: Verify that the installed version of IBM WebSphere Portal includes CF10 (PI08371) or a later fix containing the security update.
- Re-test: Re-run the Nessus scan with ID 265ef7be to confirm it no longer detects the vulnerability.
- Monitoring: Monitor application logs for errors related to Oracle Outside In Technology; a decrease in these errors indicates successful remediation.
6. Preventive Measures and Monitoring
Update security baselines to include the latest patch levels for IBM WebSphere Portal. Incorporate vulnerability scanning into CI/CD pipelines to identify similar issues early in the development process.
- Baselines: Update your security baseline or policy to require CF10 (PI08371) or later for IBM WebSphere Portal installations.
- Pipelines: Add a vulnerability scan step to your CI/CD pipeline that checks for known vulnerabilities in deployed software packages.
- Asset and patch process: Establish a regular review cycle for security patches and configuration updates, ensuring timely application of critical fixes.
7. Risks, Side Effects, and Roll Back
- Risk or side effect 1: Applying the patch may temporarily disrupt portal services.
- Risk or side effect 2: Compatibility issues with custom portal extensions are possible; test thoroughly in a non-production environment first.
8. References and Resources
- Vendor advisory or bulletin: http://www-01.ibm.com/support/docview.wss?uid=swg21664355
- NVD or CVE entry: /cve/CVE-2013-5879
- Product or platform documentation relevant to the fix: N/A