GLSA-201706-27 : FreeRADIUS: Security bypass

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


Synopsis :

The remote Gentoo host is missing one or more security-related
patches.

Description :

The remote host is affected by the vulnerability described in GLSA-201706-27
(FreeRADIUS: Security bypass)

It was discovered that the implementation of TTLS and PEAP in FreeRADIUS
skips inner authentication when it handles a resumed TLS connection. The
affected versions of FreeRADIUS fails to reliably prevent the resumption
of unauthenticated sessions unless the TLS session cache is disabled
completely.

Impact :

An unauthenticated remote user can bypass authentication by starting a
session, and then resuming an unauthenticated TLS session before inner
authentication has been completed successfully.

Workaround :

Set “enabled = no” in the cache subsection of eap module settings to
disable TLS session caching.

See also :

https://security.gentoo.org/glsa/201706-27

Solution :

All FreeRADIUS users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=net-dialup/freeradius-3.0.14'

Risk factor :

High / CVSS Base Score : 7.5
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P)

Family: Gentoo Local Security Checks

Nessus Plugin ID: 101073 ()

Bugtraq ID:

CVE ID: CVE-2017-9148

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