saruman9
Source-scoped identity with 2 associated PoCs and 2 linked vulnerabilities.
Exploit catalog results
Showing 2 PoCs on this page
GitHubsaruman9/cve_2025_20265
Repository PoCStars: 0Created 2025-09-16ScannerCVE-2025-202655 files
Analysis
Technical assessment
The artifact is a Rust-based scanner that checks if a target Cisco Secure FMC instance is vulnerable to CVE-2025-20265 by attempting to trigger a callback via SSH and HTTP authentication with a crafted password containing a curl command. It does not execute arbitrary commands on the target; it only validates the vulnerability by observing the callback.
Backdoor review
No backdoor observed in reviewed code
The PoC is a Rust-based scanner/exploit for CVE-2025-20265 (Cisco FMC RADIUS RCE). It checks if a target is a vulnerable Cisco FMC, then attempts to trigger the RCE via SSH and HTTP by injecting a curl command that calls back to the attacker's listener. The code performs only the advertised vulnerability check and exploitation; no hidden persistence, credential theft, unrelated payloads, or deceptive behavior was observed.
Classification basis and observed behavior
Classification basis
The code sends crafted authentication requests to trigger a callback (curl to attacker's IP) if the target is vulnerable, but it only observes the callback to confirm vulnerability. It does not deliver a payload or execute arbitrary commands on the target beyond the diagnostic curl. The README describes it as a 'functional exploit' but the code's primary operation is detection and validation, not exploitation.
README.md:7src/main.rs:125-158src/main.rs:340-345Requirements
- Target must be a Cisco Secure FMC instance configured for RADIUS authentication.
README.md:1 - Attacker must have a publicly reachable IP and open port to receive callbacks.
src/main.rs:37-40
Observed behavior
- Performs honeypot detection by checking HTTP redirects, server header, and copyright.
src/main.rs:192-250 - Extracts a version hash from the login page to identify the FMC version.
src/main.rs:252-267 - Attempts SSH authentication with a crafted password containing a curl command to the attacker's listener.
src/main.rs:125-142 - Attempts HTTP authentication with a crafted password containing a curl command to the attacker's listener.
src/main.rs:143-158 - Listens for incoming TCP connections and classifies callbacks as SSH or HTTP RCE based on received data.
src/main.rs:304-362 - Reports the count of targets and successful RCE checks via SSH and HTTP.
src/main.rs:183-186
Behaviors behind the backdoor verdict
Observables
- Callback Command
- Payload withheldThe SSH exploit payload injects a curl command to the attacker's listener to confirm RCE. This is the expected behavior for a PoC demonstrating command injection.
src/main.rs:127 - Callback Command
- Payload withheldThe HTTP exploit payload injects a curl command to the attacker's listener to confirm RCE. This is the expected behavior for a PoC demonstrating command injection.
src/main.rs:145 - Listener
- Payload withheldThe PoC starts a TCP listener to receive callbacks from exploited targets, confirming successful RCE. This is standard for a vulnerability scanner/exploit PoC.
src/main.rs:71-75src/main.rs:304-308 - External Service
- Payload withheldThe PoC queries ifconfig.me to obtain the attacker's public IP if not provided. This is necessary for the callback mechanism and is not a backdoor.
src/main.rs:297
What the analysis did not establish
- Two files (total 5) are omitted from the packet; their content is unknown.
- The artifact is not executed; classification is based solely on static analysis of the provided source code.
- Two text files (out of 5 total) were omitted from the evidence packet; their content is unknown but likely non-executable metadata files (e.g., .gitignore, LICENSE).
- The review is based solely on static source code analysis; no dynamic analysis or execution was performed.
This review is limited to the supplied PoC code and context. It does not assert that the code works or is safe to execute.