CVE-2020-15641 – CVE-2020-15641 is a path traversal vulnerabilit... (How to Fix)

Q: What is the severity of CVE-2020-15641?

CVE-2020-15641 has a CVSS score of 7.5 (HIGH). CVE-2020-15641 is a path traversal vulnerability in Marvell QConvergeConsole that allows unauthenticated remote attackers to read arbitrary files on the server. This can lead to disclosure of sensitive information including stored credentials. Organizations running affected versions of Marvell QConvergeConsole are vulnerable.

📋 TL;DR

CVE-2020-15641 is a path traversal vulnerability in Marvell QConvergeConsole that allows unauthenticated remote attackers to read arbitrary files on the server. This can lead to disclosure of sensitive information including stored credentials. Organizations running affected versions of Marvell QConvergeConsole are vulnerable.

💻 Affected Systems

Products:

Marvell QConvergeConsole

Versions: 5.5.0.64 and likely earlier versions

Operating Systems: Windows, Linux

Default Config Vulnerable: ⚠️ Yes

Notes: The vulnerability exists in the FlashValidatorServiceImpl class and affects all default installations. No special configuration is required for exploitation.

📦 What is this software?

Qconvergeconsole by Marvell

View all CVEs affecting Qconvergeconsole →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete system compromise through credential theft, lateral movement, and potential ransomware deployment across the network.

🟠

Likely Case

Disclosure of administrative credentials, configuration files, and other sensitive data leading to unauthorized access to the management console and connected storage systems.

🟢

If Mitigated

Limited to information disclosure only, with no further compromise if strong network segmentation and credential rotation are implemented.

🌐 Internet-Facing: HIGH - Authentication is not required and the vulnerability is remotely exploitable, making internet-facing instances extremely vulnerable.

🏢 Internal Only: HIGH - Even internally, the lack of authentication requirement makes this easily exploitable by any internal threat actor.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: LIKELY

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

The vulnerability is straightforward to exploit as it requires no authentication and involves simple path traversal techniques. While no public PoC exists, the technical details are sufficient for attackers to develop exploits.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 5.5.0.64 with patch or later versions

Vendor Advisory: https://www.marvell.com/content/dam/marvell/en/public-collateral/fibre-channel/marvell-fibre-channel-security-advisory-2020-07.pdf

Restart Required: Yes

Instructions:

1. Download the latest patch from Marvell support portal. 2. Backup current configuration. 3. Apply the patch following vendor instructions. 4. Restart the QConvergeConsole service. 5. Verify the fix by checking the version.

🔧 Temporary Workarounds

Network Access Restriction

all

Restrict network access to QConvergeConsole management interface to only trusted IP addresses

# Example firewall rule (Linux iptables): iptables -A INPUT -p tcp --dport [QCC_PORT] -s [TRUSTED_IP] -j ACCEPT
# Example firewall rule (Windows): New-NetFirewallRule -DisplayName "QCC Access" -Direction Inbound -Protocol TCP -LocalPort [QCC_PORT] -RemoteAddress [TRUSTED_IP] -Action Allow

Web Application Firewall

all

Deploy WAF rules to block path traversal patterns in HTTP requests

# Example ModSecurity rule: SecRule ARGS "\.\./" "id:1001,phase:2,deny,msg:'Path Traversal Attempt'

🧯 If You Can't Patch

Isolate the QConvergeConsole server in a dedicated VLAN with strict access controls and no internet connectivity
Implement credential rotation for all accounts that could be exposed through this vulnerability and monitor for unauthorized access attempts

🔍 How to Verify

Check if Vulnerable:

Check if the getFileUploadBytes method in FlashValidatorServiceImpl class exists and lacks proper path validation. Test with controlled path traversal attempts (e.g., ../../etc/passwd on Linux).

Check Version:

Check the QConvergeConsole web interface or configuration files for version information. On Linux: grep -r "5.5" /opt/marvell/qconvergeconsole/ 2>/dev/null

Verify Fix Applied:

Verify the patch is applied by checking version number and attempting path traversal tests that should now be blocked. Review application logs for successful blocking of traversal attempts.

📡 Detection & Monitoring

Log Indicators:

HTTP requests containing ../ or ..\ patterns
Access to sensitive file paths in web server logs
Failed authentication attempts following file disclosure

Network Indicators:

Unusual outbound connections from QConvergeConsole server
Traffic to unexpected ports following potential credential theft

SIEM Query:

source="qconvergeconsole.log" AND ("../" OR "..\\" OR "getFileUploadBytes")

📊 Metadata

CVE ID: CVE-2020-15641

CVSS v3 Score: 7.5 (HIGH)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE: CWE-22

Published: August 25, 2020

Last Updated: November 21, 2024

🔗 References

https://www.marvell.com/content/dam/marvell/en/public-collateral/fibre-channel/marvell-fibre-channel-security-advisory-2020-07.pdf Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-969/ Third Party Advisory,VDB Entry
https://www.marvell.com/content/dam/marvell/en/public-collateral/fibre-channel/marvell-fibre-channel-security-advisory-2020-07.pdf Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-969/ Third Party Advisory,VDB Entry

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🔗 Related Vulnerabilities

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