Bug 236247

Summary: CVE-2007-2028 Freeradius EAP-TTLS denial of service
Product: Red Hat Enterprise Linux 5 Reporter: Josh Bressers <bressers>
Component: freeradiusAssignee: Thomas Woerner <twoerner>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: 5.0CC: security-response-team
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: impact=moderate,source=freeradius,public=20070412,reported=20070412
Fixed In Version: RHSA-2007-0338 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2007-05-10 16:04:13 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
Upstream Patch none

Description Josh Bressers 2007-04-12 17:31:12 UTC 
A flaw was found in the way FreeRADIUS parses certain authentication requests.
The upstream description explain it as such:
http://www.freeradius.org/security.html

    2007.04.10 v1.1.5, and earlier - A malicous 802.1x supplicant could send
    malformed Diameter format attributes inside of an EAP-TTLS tunnel. The
    server would reject the authentication request, but would leak one
    VALUE_PAIR data structure, of approximately 300 bytes. If an attacker
    performed the attack many times (e.g. thousands or more over a period of
    minutes to hours), the server could leak megabytes of memory, potentially
    leading to an "out of memory" condition, and early process exit.

    We recommend that administrators using EAP-TTLS upgrade immediately.
    This bug was found as part of the Coverity Scan project.

The EAP-TTLS support is not enabled by default in any FreeRADIUS
installations.


This flaw also affects RHEL 3 and 4.
Comment 1 Josh Bressers 2007-04-12 17:31:12 UTC 
Created attachment 152488 [details]
Upstream Patch
Comment 11 Red Hat Bugzilla 2007-05-10 16:04:13 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2007-0338.html