Bug 236247 - CVE-2007-2028 Freeradius EAP-TTLS denial of service
CVE-2007-2028 Freeradius EAP-TTLS denial of service
Status: CLOSED ERRATA
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: freeradius (Show other bugs)
5.0
All Linux
medium Severity medium
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Assigned To: Thomas Woerner
impact=moderate,source=freeradius,pub...
: Security
Depends On:
Blocks:
  Show dependency treegraph
 
Reported: 2007-04-12 13:31 EDT by Josh Bressers
Modified: 2007-11-30 17:07 EST (History)
1 user (show)

See Also:
Fixed In Version: RHSA-2007-0338
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Environment:
Last Closed: 2007-05-10 12:04:13 EDT
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RHEL 7.3 requirements from Atomic Host:
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Attachments (Terms of Use)
Upstream Patch (1.54 KB, patch)
2007-04-12 13:31 EDT, Josh Bressers
no flags Details | Diff

  None (edit)
Description Josh Bressers 2007-04-12 13:31:12 EDT
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 13:31:12 EDT
Created attachment 152488 [details]
Upstream Patch
Comment 11 Red Hat Bugzilla 2007-05-10 12:04:13 EDT
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

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