This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
--MAWonucbfvhkJ53UcHpHg5TJEesf0C53S
Content-Type: multipart/mixed;
 boundary="4AQFS0KtWMP8jwnEclX1WrDEvULCeCuRI";
 protected-headers="v1"
From: Thomas Deutschmann <whissi@gentoo.org>
Reply-To: security@gentoo.org
To: gentoo-announce@lists.gentoo.org
Message-ID: <45da9a08-9e61-969e-a796-472a6e4d6d21@gentoo.org>
Subject: [ GLSA 201706-07 ] Libtirpc and RPCBind: Denial of Service

--4AQFS0KtWMP8jwnEclX1WrDEvULCeCuRI
Content-Type: text/plain; charset=utf-8
Content-Language: en-U
Content-Transfer-Encoding: quoted-printable

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 201706-07
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                           https://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

 Severity: Normal
    Title: Libtirpc and RPCBind: Denial of Service
     Date: June 06, 2017
     Bugs: #617472
       ID: 201706-07

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

A vulnerability has been found in Libtirpc and RPCBind which may allow
a remote attacker to cause a Denial of Service condition.

Background
==========

The RPCBind utility is a server that converts RPC program numbers into
universal addresses.

Libtirpc is a port of Suns Transport-Independent RPC library to Linux.

Affected packages
=================

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  net-nds/rpcbind             < 0.2.4-r                 >= 0.2.4-r
  2  net-libs/libtirpc           < 1.0.1-r1               >= 1.0.1-r1
    -------------------------------------------------------------------
     2 affected packages

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

It was found that due to the way RPCBind uses libtirpc (libntirpc), a
memory leak can occur when parsing specially crafted XDR messages.

Impact
======

A remote attacker could send thousands of messages to RPCBind, possibly
resulting in a Denial of Service condition.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All RPCBind users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-nds/rpcbind-0.2.4-r"

All Libtirpc users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-libs/libtirpc-1.0.1-r1"

References
==========

[ 1 ] CVE-2017-8779
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-8779

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

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

 https://security.gentoo.org/glsa/201706-07

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@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2017 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/2.5


--4AQFS0KtWMP8jwnEclX1WrDEvULCeCuRI--

--MAWonucbfvhkJ53UcHpHg5TJEesf0C53S
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="signature.asc"

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0
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=PFud
-----END PGP SIGNATURE-----

--MAWonucbfvhkJ53UcHpHg5TJEesf0C53S--