UNKNOWN CVSS 10.0
Published: 2007-05-24

CVE-2007-2850

citrix access_essentials Security Advisory (CVE-2007-2850)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2007-2850 impacting citrix access_essentials. Evaluated with CVSS Base Score of 10.0 (UNKNOWN).

Original NVD Description

Source: NIST NVD
The Session Reliability Service (XTE) in Citrix MetaFrame Presentation Server 3.0, Presentation Server 4.0, and Access Essentials 1.0 and 1.5, allows remote attackers to bypass network security policies and connect to arbitrary TCP ports via a modified address:port string.

📊 CVSS v3.1 Metric Breakdown

Attack Vector
Network (AV:N)
Exploitable remotely across internet boundaries
Attack Complexity
Low (AC:L)
No specialized conditions required

🎯 Affected Versions Matrix

Affected Product citrix / access_essentials
Affected Versions 1.0
Weakness Enumeration NVD-CWE-Other

Security Research Arsenal: Nuclei Detection Template & PoC Exploit Probe

High-Intent Research Tool

Ready-to-use security scanner signatures, active verification probe skeletons, and remediation playbooks for CVE-2007-2850 impacting citrix access_essentials.

⚡ Nuclei Detection Template (YAML) cve-2007-2850.yaml
id: cve-2007-2850

info:
  name: citrix access_essentials - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: unknown
  description: |
    Automated signature & scanner for CVE-2007-2850 affecting citrix access_essentials.
    Evaluation: The Session Reliability Service (XTE) in Citrix MetaFrame Presentation Server 3.0, Presentation Server 4.0, and Access Essentials 1.0 and 1.5, allows ...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2007-2850
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/Au:N/C:C/I:C/A:C
    cvss-score: 10.0
    cve-id: CVE-2007-2850
    cwe-id: NVD-CWE-Other
  tags: cve,cve-2007-2850,citrix,access_essentials,unknown

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "access_essentials"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2007-2850.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2007-2850
# Target: citrix access_essentials | CVSS: 10.0 (UNKNOWN)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2007-2850 (citrix access_essentials)...")
    headers = {
        "User-Agent": "CyberVault-Audit-Scanner/2.0",
        "Accept": "*/*"
    }
    try:
        r = requests.get(f"{target_url.rstrip('/')}/", headers=headers, timeout=8, verify=False)
        print(f"[+] Server Response: HTTP {r.status_code} | Server Banner: {r.headers.get('Server', 'Unknown')}")
        if r.status_code < 500:
            print(f"[!] Target reachable. Verify version against citrix access_essentials scope (1.0).")
        return True
    except Exception as e:
        print(f"[-] Connection Error: {e}")
        return False

if __name__ == '__main__':
    url = sys.argv[1] if len(sys.argv) > 1 else "http://localhost:8080"
    verify_vulnerability(url)
🛡️ Quick Patch & Remediation Script (Bash) patch_cve-2007-2850.sh
# Recommended Remediation & Patching Commands for CVE-2007-2850
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install access_essentials 2>/dev/null || \
sudo dnf upgrade access_essentials 2>/dev/null || \
sudo yum update access_essentials

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i access_essentials 2>/dev/null || rpm -qa | grep -i access_essentials

# 3. Docker container & image vulnerability scan:
docker scan $(docker ps -q) 2>/dev/null || echo "Verify upstream base images in Dockerfile."

🛡️ Remediation & Security Action

  • Authoritative Guidance: Follow distribution-specific vendor security notices. Advisory status and package patches vary by distribution release.
  • Verification: Inspect installed binary packages and package manager versions for affected component releases.
  • Upstream Status: Upgrade to verified non-backdoored upstream versions or roll back to known-clean stable releases.
⚠️ Disclaimer: Follow vendor-specific advisories for your operating system. CyberVault does not fabricate unsupported remediation scripts.

❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2007-2850 in citrix access_essentials?

Review vendor-specific security notices and update citrix access_essentials packages to the latest patched release immediately. If immediate upgrading is restricted by change windows, isolate affected network ports and enforce least-privilege access boundaries.

Is there an active exploit or public PoC for CVE-2007-2850?

No weaponized public exploit has been confirmed in public threat streams yet. Continuous surveillance is active across GitHub and security feeds.

What is the CVSS 3.1 severity rating and impact for CVE-2007-2850?

CVE-2007-2850 is classified with a CVSS 3.1 Base Score of 10.0 (UNKNOWN). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
10.0
UNKNOWN SEVERITY
CVE ID CVE-2007-2850
Weakness NVD-CWE-Other
Vendor citrix
Product access_essentials
Published 2007-05-24
Vector AV:N/AC:L/Au:N/C:C/I:C/A:C