System certificate in use with a weak key or signature
At a glance
Base severity
Area
Platform
Evidence level
Benchmark reference
Reads the export, not the device
ConfigProof reads a configuration export. This control is evaluated against the objects in that file, and it reports what the file says. It does not connect to the device and sees no traffic, so a finding here describes the configuration, not what the firewall is doing right now.
Why it matters
An RSA key under 2048 bits or a SHA-1 signature is rejected by current supplicants and browsers, and a forged certificate becomes feasible: an EAP or Admin certificate that cannot be trusted lets a rogue server pose as the ISE.
How to fix it
Web interface
The steps below are written for the web interface. A finding raised on your own export carries the same steps with your object names filled in.
- In ISE: Administration > System > Certificates > System Certificates: generate a CSR with an RSA key of 2048 bits or more (or an EC key) and a SHA-256 signature, have the CA sign it, bind it and move the uses to it.
- Delete the old certificate once nothing uses it.
Command line
This analyzer version writes no command text for this control. The steps above are the remediation it offers.
How to confirm the fix
- In ISE: Administration > System > Certificates > System Certificates: the certificate that holds the use shows a key of 2048 bits or more and a SHA-256 or stronger signature.
Limits
- No limitation is recorded for this control beyond the one that applies to all of them: it reads a configuration export.
Compliance references
No benchmark recommendation is mapped to this control in this version.
More in Certificates and PKI
- PAN-SEC-047Certificate has passed its validity date
- PAN-SEC-048Certificate expires within the renewal window
- PAN-SEC-049TLS service profile names a certificate that is not defined
- PAN-SEC-050TLS service profile permits an obsolete protocol version
- PAN-SEC-116Certificate profile checks no revocation
- ISE-MGT-007System certificate expired or expiring within 90 days
- ISE-MGT-008Self-signed certificate used for Admin or EAP
See it on your own firewall
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