How to remediate – Ekiga SIP Detection

1. Introduction

Ekiga is running on the remote host. Ekiga is a voice-over-IP (VoIP) application, meaning it allows users to make phone calls over an internet connection. Its presence indicates a potential attack surface if not properly managed or secured. This vulnerability has a low impact on confidentiality, integrity and availability as it simply identifies software running on the system.

2. Technical Explanation

The remote SIP service is identified as originating from Ekiga. While not an active exploit, knowing this information can help attackers target systems with known vulnerabilities in Ekiga or related VoIP technologies. There are no publicly available CVEs associated with simple detection of the software.

• Root cause: The presence of the Ekiga application on the system.
• Exploit mechanism: An attacker could use this information to identify potential targets for further reconnaissance and exploitation attempts targeting known vulnerabilities in Ekiga or related VoIP protocols.
• Scope: Systems running the Ekiga application.

3. Detection and Assessment

Confirming whether a system is vulnerable involves identifying if Ekiga is installed and running.

• Quick checks: Run ps -ef | grep ekiga to check for running processes.
• Scanning: Nmap script `sip-info` may identify the service, but results are not guaranteed. This should be used as an example only.
• Logs and evidence: Check application logs or process lists for Ekiga related entries.

ps -ef | grep ekiga

4. Solution / Remediation Steps

The solution involves assessing the need for Ekiga on the system and removing it if not required.

4.1 Preparation

• Dependencies: Ensure no other applications rely on Ekiga functionality. Rollback plan: Reinstall Ekiga if needed.
• Change window needs: Standard maintenance window may be required depending on business impact. Approval from IT management is recommended.

4.2 Implementation

1. Step 1: Stop the Ekiga service using sudo systemctl stop ekiga (if applicable).
2. Step 2: Remove the Ekiga package using your distribution’s package manager, for example sudo apt remove ekiga or sudo yum remove ekiga.
3. Step 3: Verify removal by checking process lists and application directories.

4.3 Config or Code Example

This vulnerability does not involve configuration changes.

4.4 Security Practices Relevant to This Vulnerability

• Least privilege: Limit the number of applications installed on systems to reduce the attack surface.

4.5 Automation (Optional)

No automation is recommended for this vulnerability.

5. Verification / Validation

Confirming the fix involves verifying that Ekiga is no longer running or installed.

• Post-fix check: Run ps -ef | grep ekiga and confirm no processes are listed.
• Re-test: Re-run the initial detection method (process list) to verify removal.
• Smoke test: Ensure any dependent services or applications still function as expected.
• Monitoring: Monitor system logs for unexpected Ekiga related entries. This is an example only.

ps -ef | grep ekiga

6. Preventive Measures and Monitoring

Preventive measures involve regularly reviewing installed software and removing unnecessary applications.

• Baselines: Update a security baseline or policy to restrict the installation of unapproved software.

7. Risks, Side Effects, and Roll Back

Removing Ekiga may impact any services that rely on its functionality.

• Roll back: Reinstall the Ekiga package using your distribution’s package manager, for example sudo apt install ekiga or sudo yum install ekiga.

8. References and Resources

• Vendor advisory or bulletin: https://www.ekiga.org/