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Versions Affected : All versions prior to TrueNAS 12.0-U1


The X.509 GeneralName type is a generic type for representing different types of names.

One of those name types is known as EDIPartyName. OpenSSL provides a function GENERAL_NAME_cmp which compares different instances of a GENERAL_NAME to see if they are equal or not. This function behaves incorrectly when both GENERAL_NAMEs contain an EDIPARTYNAME. An attacker who is able to control both items being compared can trigger a NULL pointer dereference and a crash may occur leading to a possible denial of service attack. As an example, if an attacker can trick a client of server to check a maliciously constructed certificate against a malicious CRL could trigger the NULL dereference.


No workaround is available.


  • Upgrade to TrueNAS 12.0-U1 or later.


Further information