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CVE-2023-0656 is a stack-based buffer overflow in SonicWall SonicOS that is reachable via the web management interface. The flaw can be triggered remotely by an unauthenticated attacker, resulting in a denial-of-service condition that can crash the impacted firewall. Available advisory information indicates the SonicOS SSLVPN interface is not affected; the issue is specific to the web management interface attack surface.
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2 valid exploits after Mallory filtered fakes, detection scripts, and README-only repos.
Repository purpose: a Python-based SonicWall “Security Audit Toolkit” plus a Docker CTF-style lab that simulates and (in solutions) exploits two critical SonicWall CVEs. Top-level structure: - sonicwall_audit.py: main orchestrator CLI that runs modules (ssl, cve, auth, web) against a target https://<host>:<port>, writes JSON/text reports to reports/. - validate_cves.py: standalone deep validators for CVE-2021-20038 and CVE-2024-53704 using non-destructive behavioral checks. - modules/: implementation of auditors/validators and report generation. - lab/: docker-compose lab with two containers: - cve-2021-20038: Apache + deliberately vulnerable 32-bit CGI binary /usr/lib/cgi-bin/sslvpnclient (and symlinks portal/welcome/etc). Protections disabled (no canary, execstack, no PIE, ASLR disabled in entrypoint) to make stack overflow exploitation feasible. - cve-2024-53704: Flask/Gunicorn SSLVPN simulator on 4433 with vulnerable swap cookie deserialization (conditional HMAC verification). - lab/exploits/: skeleton exploit templates (incomplete). - lab/solutions/: working exploits. Exploit capabilities present: 1) CVE-2024-53704 (auth bypass via cookie forgery): Working exploit forges a base64-encoded JSON session cookie named swap with {username, authenticated:true} and omits sig_version so the server skips HMAC verification. It then accesses /virtual-office/ and /dashboard to retrieve the flag. 2) CVE-2021-20038 (stack buffer overflow -> RCE): Working exploit crafts a URL-encoded query string payload to overflow a 4096-byte stack buffer in the CGI handler (strcpy of QUERY_STRING). Payload includes a NOP sled, null-free 32-bit x86 Linux shellcode that runs /bin//sh -c "cat /root/flag.txt", padding to offset 4100, and an attacker-chosen return address into the sled. Output is returned in the HTTP response body. Important distinction: the main toolkit modules and CVE validators are primarily scanners/validators and explicitly avoid destructive exploitation; the actual exploitation code is confined to the lab solution scripts intended for the local practice environment.
This repository provides a Python proof-of-concept (PoC) script (poc.py) for testing and exploiting two stack-based buffer overflow vulnerabilities in SonicWall SonicOS (CVE-2022-22274 and CVE-2023-0656). The exploit targets the web management interface of SonicWall NGFW devices via HTTPS, sending specially crafted HTTP GET requests with overly long URI paths to specific endpoints (/resources/, //, /atp/, /stats/, /Security_Services). The script can safely test for vulnerability or trigger a denial-of-service (DoS) by crashing the device. The README.md offers detailed background, usage instructions, and example outputs. The code is standalone, written in Python, and does not rely on external frameworks. No hardcoded IPs or domains are present; the user supplies the target. The repository is structured with a single exploit script, a README, and a license file.
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