full-disclosure - ERRATA: [ GLSA 200411-01 ] ppp: No denial of service vulnerability

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From: lewk at gentoo.org (Luke Macken)
Subject: ERRATA: [ GLSA 200411-01 ] ppp: No denial of service vulnerability

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Gentoo Linux Security Advisory                           GLSA 200411-01
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                                            http://security.gentoo.org/
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  Severity: Low
     Title: ppp: No denial of service vulnerability
      Date: November 01, 2004
      Bugs: #69152
        ID: 200411-01

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Synopsis
========

pppd contains a bug that allows an attacker to crash his own
connection, but it cannot be used to deny service to other users.

Background
==========

ppp is a Unix implementation of the Point-to-Point Protocol.

Description
===========

The pppd server improperly verifies header fields, potentially leading
to a crash of the pppd process handling the connection. However, since
a separate pppd process handles each ppp connection, this would not
affect any other connection, or prevent new connections from being
established.

Impact
======

We incorrectly thought that this bug could be exploited to deny service
to all ppp users. It is not the case, this bug has no security impact
whatsoever. Many thanks to Paul Mackerras from the Samba team for
correcting our mistake.

Workaround
==========

There is no need for a workaround.

Resolution
==========

ppp users can keep their current versions.

References
==========

  [ 1 ] Incorrect BugTraq Advisory
        http://www.securityfocus.com/archive/1/379450

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200411-01.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@...too.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2004 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/1.0
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