FreeBSD : freeradius -- insufficient CRL application vulnerability (379788f3-2900-11e5-a4a5-002590263bf5)

This script is Copyright (C) 2015-2017 Tenable Network Security, Inc.


Synopsis :

The remote FreeBSD host is missing one or more security-related
updates.

Description :

oCERT reports :

The FreeRADIUS server relies on OpenSSL to perform certificate
validation, including Certificate Revocation List (CRL) checks. The
FreeRADIUS usage of OpenSSL, in CRL application, limits the checks to
leaf certificates, therefore not detecting revocation of intermediate
CA certificates.

An unexpired client certificate, issued by an intermediate CA with a
revoked certificate, is therefore accepted by FreeRADIUS.

Specifically sets the X509_V_FLAG_CRL_CHECK flag for leaf certificate
CRL checks, but does not use X509_V_FLAG_CRL_CHECK_ALL for CRL checks
on the complete trust chain.

The FreeRADIUS project advises that the recommended configuration is
to use self-signed CAs for all EAP-TLS methods.

See also :

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=201058
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=201059
http://www.ocert.org/advisories/ocert-2015-008.html
http://freeradius.org/security.html
http://www.nessus.org/u?a2ec76c7

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 5.0
(CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N)

Family: FreeBSD Local Security Checks

Nessus Plugin ID: 84697 ()

Bugtraq ID:

CVE ID: CVE-2015-4680

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