PCI Compliance Scan Certificate errors

10/25/2022 883 People found this article helpful 492,285 Views

Description

This article shows some of the PCI Scan Certificate errors related to PCI Compliance and the explanation or the way to resolve them.

Resolution

Here's some of the errors:

SSLv2 Supported
SonicWall UTM appliances do not support SSLv2. This error could be due to a device, like a webserver, behind the SonicWall using SSLv2.
SSL Weak Encryption Algorithms
This error could be due to a device, like a webserver, behind the SonicWall using less than 128 bit encryption. SonicWall UTM appliances support the following cipher-suites:

Protocol Version	Cipher Suite	Encryption bit
SSLv3	AES256-SHA	256
SSLv3	DES-CBC3-SHA	168
SSLv3	AES128-SHA	128
SSLv3	RC4-MD5	128
SSLv3	RC4-SHA	128
TLSv1	AES256-SHA	256
TLSv1	DES-CBC3-SHA	168
TLSv1	AES128-SHA	128
TLSv1	RC4-MD5	128
TLSv1	RC4-SHA	128

SSL certificate is signed with weak hash function

All SonicWall devices with the latest SoniOS firmware, Gen4 and Gen5 - both SonicOS Standard and Enhanced - use SHA1 in the SonicWall self-signed certificate. This error could be due to a device behind the SonicWall using MD5.

If it is determined that this vulnerability is found in the SonicWall, then it could be due to importing a 3rd party certificate with a weak hash.

In rare cases a SonicWall self-signed certificate with the latest firmware could have MD5. In such cases the reason could be upgrading from an older firmware hasn't still made SonicWall use SHA1 hash. The suggested workaround would be to change the Certificate Common Name (CN) under System > Administration page and restart. This will force the SonicWall to re-generate the self-signed certificate and use SHA1.

SSL Certificate is Self-Signed

All SonicWall UTM appliances have an inbuilt self-signed certificate. By default, this certificate is used for HTTPS web management. It is recommended to use a certificate signed by a third party Certificate Authority (CA) like Verisign or GoDaddy. Refer these articles on how to obtain certificates from a public CA, GoDaddy and Thawte as examples:
- Installing GoDaddy Certificate in SonicWall UTM device
- How to Request and Import a Signed Certificate from Thawte
SSL Certificate is Not Trusted

This error occurs when the certificate in the HTTP web management or SSL VPN is signed by an unknown Certificate Authority (CA). In most cases this happens when the CA is private. For example, a Windows CA. Obtain a certificate signed by a public CA.
SSL Certificate has an IP Address as the Common Name

The certificate used in HTTP web management or SSL VPN has IP address instead of FQDN in Common Name (CN) field. Obtain a certificate with an FQDN as its CN or Subject Alternative Name.
Subject Common Name Does Not Match Server FQDN

Obtain a certificate whose Subject Common Name (CN) or Subject Alternative Name (SAN) matches the FQDN used to access it. For example, if the scan is being done using the FQDN www.example.com, the certificate must have its CN or SAN as www.example.com or *.example.com.
SSL Certificate - Signature Verification Failed Vulnerability
This error occurs when the certificate in the HTTP web management or SSL VPN is signed by an unknown Certificate Authority (CA). In most cases this happens when the CA is private. For example, a Windows CA. Obtain a certificate signed by a public CA.
Port 500 Remote Access Service Detected:
This error occurs when a WANGroupVPN is enabled so port 500 will be open. You can create custom rules from WAN to WAN to limit WAN GroupVPN access to only specific Public IPs or users.
Port 500 Weak Encryption Ciphers identified on VPN Device
This error occurs when WANGroupVPN ciphers are too weak. Make sure you're not using strong Encryption and Authentication algorithms for IKE and IPSec Proposals and that Default Key Provisioning is disabled.

PCI Compliance scan fails the vulnerability test while accessing the IP address

Usually, the PCI compliance vulnerability test fails while accessing the IP address and the same PCI compliance vulnerability test passes while accessing anything with a domain name.

When the CSR is generated on SonicWALL, if the common name is set to domain, then the PCI compliance vulnerability test will only pass for domain and not the IP addresses.

So, as far as the cert is associated with the domain name, it will fail for the IP address which is the normal behavior.

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PCI Compliance Scan Certificate errors

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