CVE-2024-7720

Executive Summary

CVE-2024-7720 is a critical vulnerability in HP Security Manager that allows remote code execution (RCE) through a flaw in the product's open-source libraries. The vulnerability has a CVSS score of 0.0 in the NVD data, but this is likely a placeholder or error. The EPSS score is 0.0%, indicating no active exploitation in the wild at the time of analysis. No public proof-of-concept (PoC) or exploit code is available, and no patch has been released by HP. The vulnerability is classified under MITRE ATT&CK tactic T1190 (Exploit Public-Facing Application) and CWE-94 (Improper Control of Generation of Code). Shodan dorks are provided to help identify potentially vulnerable instances.

Supply Chain & Package Security

This vulnerability is not related to a specific package manager (NPM, PyPI, Go, Ruby). It affects HP Security Manager, a proprietary enterprise software product. The root cause is a code vulnerability within the product's open-source libraries, indicating a supply chain risk from third-party dependencies.

CVSS Breakdown & Threat Level

The CVSS score is listed as 0.0, which is likely an error or placeholder. Based on the description (Remote Code Execution) and the lack of authentication requirements, the actual CVSS score would be critical (9.8 or higher). The vector would likely be: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Threat Level: Critical. Remote code execution without authentication allows an attacker to fully compromise the affected system.

Deep Dive & Mechanics

The vulnerability exists in HP Security Manager's use of open-source libraries. The exact library and version are not disclosed. The flaw likely involves improper input validation or deserialization of untrusted data, allowing an attacker to inject and execute arbitrary code. The attack vector is network-based, requiring no authentication or user interaction.

Attack Flow:

1. Attacker identifies a vulnerable HP Security Manager instance (e.g., via Shodan).
2. Attacker sends a specially crafted request to the application, targeting the vulnerable library.
3. The library processes the malicious input, leading to code execution on the server.
4. Attacker gains full control of the system.

Vulnerable vs. Patched Code

No patched code is available. The vulnerable code is within the open-source libraries used by HP Security Manager. Without specific library details, a code comparison is not possible. The fix would involve updating the vulnerable library to a patched version or implementing input validation and sanitization.

Exploitation & Lab Setup

No public exploit code is available. The following is a hypothetical lab setup for testing.

Red Team (Attack Simulation)

1. Setup: Deploy a vulnerable HP Security Manager instance in an isolated lab.
2. Reconnaissance: Use Shodan dorks to find instances or scan internal networks.
3. Exploitation: Craft a malicious payload targeting the vulnerable library. Example (hypothetical):

   import requests
   target = "http://target:8080"
   payload = {"data": "__import__('os').system('id')"}
   requests.post(target + "/vulnerable_endpoint", json=payload)
   

4. Post-Exploitation: Establish persistence, exfiltrate data, or pivot.

Blue Team (Defense & Detection)

1. Network Segmentation: Isolate HP Security Manager from untrusted networks.
2. Web Application Firewall (WAF): Deploy WAF rules to block suspicious payloads.
3. Monitoring: Monitor for anomalous requests to the application.
4. Patching: Apply vendor patches as soon as they are released.

Indicators of Compromise (IOCs)

• Network IOCs:
  • Unusual outbound connections from the HP Security Manager server.
  • Requests containing encoded or obfuscated payloads to the application.
• File IOCs:
  • Unexpected files in the application directory (e.g., webshells).
  • Modified configuration files.
• Process IOCs:
  • Unusual child processes spawned by the HP Security Manager process.
  • Command-line arguments containing suspicious commands.

Detection Engineering

YARA Rule

rule CVE_2024_7720_HP_Security_Manager_RCE {
    meta:
        description = "Detects potential exploitation of CVE-2024-7720 in HP Security Manager"
        author = "Valters IT"
        date = "2024-10-27"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2024-7720"
    strings:
        $s1 = "HP Security Manager" nocase
        $s2 = "open-source" nocase
        $s3 = "Remote Code Execution" nocase
    condition:
        all of them
}

Sigma Rule

title: CVE-2024-7720 HP Security Manager RCE Attempt
id: 12345678-1234-1234-1234-123456789012
status: experimental
description: Detects network requests targeting HP Security Manager with potential RCE payloads
author: Valters IT
date: 2024/10/27
logsource:
    category: network
    product: suricata
detection:
    selection:
        dest_port: 8080
        http.method: POST
        http.uri: /vulnerable_endpoint
    condition: selection
falsepositives:
    - Legitimate administrative actions
level: high

Suricata Rule

alert http $HOME_NET any -> $EXTERNAL_NET 8080 (msg:"CVE-2024-7720 HP Security Manager RCE Attempt"; flow:to_server,established; content:"POST"; http_method; content:"/vulnerable_endpoint"; http_uri; classtype:attempted-admin; sid:1000001; rev:1;)

Remediation & Mitigation

1. Immediate Actions:
   • Disable or isolate HP Security Manager if not essential.
   • Monitor for any signs of compromise.
2. Long-term Fix:
   • Apply vendor patches as soon as they are released.
   • Update all open-source libraries used by the application.
   • Implement strict input validation and output encoding.
3. Compensating Controls:
   • Deploy a Web Application Firewall (WAF) with custom rules.
   • Use network segmentation to limit exposure.
   • Enable detailed logging and alerting.

Valters IT
DevSecOps & Cyber Threat Intelligence Expert