Home / mailings [gentoo-announce] [ GLSA 201701-20 ] D-Bus: Format string vulnerability
Posted on 11 January 2017
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From: Aaron Bauman <bman@gentoo.org>
To: gentoo-announce@lists.gentoo.org
Message-ID: <d08fe11e-fc69-e443-5f1e-830e84b1eda6@gentoo.org>
Subject: [ GLSA 201701-20 ] D-Bus: Format string vulnerability
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Gentoo Linux Security Advisory GLSA 201701-20
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https://security.gentoo.org/
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Severity: Normal
Title: D-Bus: Format string vulnerability
Date: January 11, 2017
Bugs: #596772
ID: 201701-20
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Synopsis
========
A vulnerability has been found in D-Bus possibly resulting in a local
Denial of Service.
Background
==========
D-Bus is a message bus system, a simple way for applications to talk to
one another.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 sys-apps/dbus < 1.10.12 >= 1.10.12
Description
===========
It was discovered that D-Bus incorrectly handles certain format
strings.
The impact of this new vulnerability is believed to not be exploitable
if D-Bus is patched against CVE-2015-0245. The previous vulnerability
(CVE-2015-0245) was addressed in GLSA-201503-02 referenced below.
Impact
======
A local attacker could cause a Denial of Service condition or possibly
execute arbitrary code.
Workaround
==========
The vulnerable D-Bus interface is intended only for use by systemd
running as root.
The administrator can install a policy which denies sending from
org.freedesktop.systemd1.Activator" to D-Bus. This will prevent
non-root attackers from reaching the interface in order to exercise
this flaw.
Resolution
==========
All D-Bus users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-apps/dbus-1.10.12"
References
==========
[ 1 ] GLSA-201503-02
https://security.gentoo.org/glsa/201503-02
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/201701-20
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
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<pre style="color: rgb(0, 0, 0); font-style: normal; font-variant-l=igatures: normal; font-variant-caps: normal; font-weight: normal; letter-=spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-tr=ansform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0=px; word-wrap: break-word; white-space: pre-wrap;">- - - - - - - - - - - =- - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory GLSA 201701-20
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
<a class="moz-txt-link-freet=ext" href="https://security.gentoo.org/">https://security.gentoo.org/</=a>
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Severity: Normal
Title: D-Bus: Format string vulnerability
Date: January 11, 2017
Bugs: #596772
ID: 201701-20
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Synopsis
========
A vulnerability has been found in D-Bus possibly resulting in a local
Denial of Service.
Background
==========
D-Bus is a message bus system, a simple way for applications to talk to
one another.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 sys-apps/dbus < 1.10.12 >= 1.1=0.12
Description
===========
It was discovered that D-Bus incorrectly handles certain format
strings.
The impact of this new vulnerability is believed to not be exploitable
if D-Bus is patched against CVE-2015-0245. The previous vulnerability
(CVE-2015-0245) was addressed in GLSA-201503-02 referenced below.
Impact
======
A local attacker could cause a Denial of Service condition or possibly
execute arbitrary code.
Workaround
==========
The vulnerable D-Bus interface is intended only for use by systemd
running as root.
The administrator can install a policy which denies sending from
org.freedesktop.systemd1.Activator" to D-Bus. This will prevent
non-root attackers from reaching the interface in order to exercise
this flaw.
Resolution
==========
All D-Bus users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-apps/dbus-1.10.12"
References
==========
[ 1 ] GLSA-201503-02
<a class="moz-txt-link-freetext" href="https://security.gentoo.=org/glsa/201503-02">https://security.gentoo.org/glsa/201503-02</a>
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
<a class="moz-txt-link-freetext" href="https://security.gentoo.org/g=lsa/201701-20">https://security.gentoo.org/glsa/201701-20</a>
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
<a class="moz-txt-link-abbreviated" href="mailto:security@gentoo.org"=>security@gentoo.org</a> or alternatively, you may file a bug at
<a class="moz-txt-link-freetext" href="https://bugs.gentoo.org">https=://bugs.gentoo.org</a>.
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.
<a class="moz-txt-link-freetext" href="http://creativecommons.org/lic=enses/by-sa/2.5">http://creativecommons.org/licenses/by-sa/2.5</a></pre>
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