CVE-2024-55877

Comprehensive Technical Analysis of CVE-2024-55877

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2024-55877 CVSS Score: 9.9

The vulnerability in XWiki Platform allows any authenticated user to execute arbitrary remote code by adding instances of XWiki.WikiMacroClass to any page. This vulnerability compromises the confidentiality, integrity, and availability of the entire XWiki installation. The CVSS score of 9.9 indicates a critical severity, reflecting the potential for significant damage if exploited.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Authenticated User Exploitation: An attacker with a valid user account can exploit this vulnerability by embedding malicious code within the XWiki.WikiMacroClass macro on any page.
• Internal Threats: Insider threats or compromised user accounts can be leveraged to execute arbitrary code.

Exploitation Methods:

• Code Injection: The attacker can inject malicious code into the XWiki.WikiMacroClass macro, which will be executed by the XWiki server.
• Privilege Escalation: Once code execution is achieved, the attacker can escalate privileges, access sensitive data, and perform unauthorized actions.

3. Affected Systems and Software Versions

Affected Versions:

• XWiki Platform versions starting from 9.7-rc-1 up to but not including 15.10.11, 16.4.1, and 16.5.0.

Fixed Versions:

• XWiki 15.10.11
• XWiki 16.4.1
• XWiki 16.5.0

4. Recommended Mitigation Strategies

Immediate Actions:

• Upgrade: Upgrade to the patched versions (15.10.11, 16.4.1, or 16.5.0) as soon as possible.
• Manual Patch: Apply the manual patch to the page XWiki.XWikiSyntaxMacrosList as a temporary workaround if upgrading is not immediately feasible.

Long-Term Strategies:

• Access Control: Implement strict access controls and monitor user activities to detect and prevent unauthorized actions.
• Regular Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate potential threats.
• User Education: Educate users about the risks of embedding untrusted macros and the importance of reporting suspicious activities.

5. Impact on Cybersecurity Landscape

Broader Implications:

• Widespread Adoption: XWiki Platform is widely used in various organizations, making this vulnerability a significant risk.
• Supply Chain Risks: Organizations using XWiki as part of their supply chain or internal documentation systems are at risk of data breaches and operational disruptions.
• Reputation Damage: Successful exploitation can lead to loss of trust and reputation damage for affected organizations.

6. Technical Details for Security Professionals

Vulnerability Details:

• Root Cause: The vulnerability arises from insufficient input validation and sanitization of the XWiki.WikiMacroClass macro, allowing arbitrary code execution.
• Exploit Code: The exploit involves embedding a specially crafted macro that includes malicious code. This code is executed by the XWiki server when the page is rendered.

Detection and Monitoring:

• Log Analysis: Monitor server logs for unusual activities, especially those related to macro execution and user actions.
• Intrusion Detection Systems (IDS): Implement IDS to detect and alert on suspicious activities that may indicate an exploitation attempt.

Patch Information:

• GitHub Commit: The patch can be reviewed at GitHub Commit.
• Vendor Advisory: Detailed advisory and mitigation steps are available at GHSA-2r87-74cx-2p7c.

References:

• GitHub Commit
• Vendor Advisory
• Jira Issue

By following these recommendations and staying vigilant, organizations can mitigate the risks associated with CVE-2024-55877 and protect their XWiki installations from potential exploitation.