Home / mailings [gentoo-announce] [ GLSA 201607-13 ] libbsd: Arbitrary code execution
Posted on 20 July 2016
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From: Aaron Bauman <bman@gentoo.org>
To: gentoo-announce@lists.gentoo.org
Message-ID: <80d10308-3641-49c5-c897-c9558161d4cb@gentoo.org>
Subject: [ GLSA 201607-13 ] libbsd: Arbitrary code execution
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Gentoo Linux Security Advisory GLSA 201607-13
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https://security.gentoo.org/
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Severity: Normal
Title: libbsd: Arbitrary code execution
Date: July 20, 2016
Bugs: #573160
ID: 201607-13
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Synopsis
========
A buffer overflow in libbsd might allow remote attackers to execute
arbitrary code.
Background
==========
This library provides useful functions commonly found on BSD systems,
and lacking on others like GNU systems, thus making it easier to port
projects with strong BSD origins, without needing to embed the same
code over and over again on each project.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-libs/libbsd < 0.8.2 >= 0.8.2
Description
===========
libbsd contains a buffer overflow in the fgetwln() function. An if
statement, which is responsible for checking the necessity to
reallocate memory in the target buffer, is off by one therefore an out
of bounds write occurs.
Impact
======
Remote attackers could potentially execute arbitrary code with the
privileges of the process.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All libbsd users should upgrade to the latest version:
# emerge --sync
# emerge --ask --verbose --oneshot ">=dev-libs/libbsd-0.8.2"
References
==========
[ 1 ] CVE-2016-2090
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-2090
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/201607-13
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 2016 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: =normal; font-weight: normal; letter-spacing: normal; line-height: normal;= orphans: auto; text-align: start; text-indent: 0px; text-transform: none=; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap=: break-word; white-space: pre-wrap;">- - - - - - - - - - - - - - - - - -= - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory GLSA 201607-13
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
<a class="moz-txt-link-freet=ext" href="https://security.gentoo.org/">https://security.gentoo.org/</=a>
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal
Title: libbsd: Arbitrary code execution
Date: July 20, 2016
Bugs: #573160
ID: 201607-13
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Synopsis
========
A buffer overflow in libbsd might allow remote attackers to execute
arbitrary code.
Background
==========
This library provides useful functions commonly found on BSD systems,
and lacking on others like GNU systems, thus making it easier to port
projects with strong BSD origins, without needing to embed the same
code over and over again on each project.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-libs/libbsd < 0.8.2 >= 0==2E8.2
Description
===========
libbsd contains a buffer overflow in the fgetwln() function. An if
statement, which is responsible for checking the necessity to
reallocate memory in the target buffer, is off by one therefore an out
of bounds write occurs.
Impact
======
Remote attackers could potentially execute arbitrary code with the
privileges of the process.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All libbsd users should upgrade to the latest version:
# emerge --sync
# emerge --ask --verbose --oneshot ">=dev-libs/libbsd-0.8.2"
References
==========
[ 1 ] CVE-2016-2090
<a class="moz-txt-link-freetext" href="http://nvd.nist.gov/nvd.=cfm?cvename=CVE-2016-2090">http://nvd.nist.gov/nvd.cfm?cvename=CVE-20=16-2090</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/201607-13">https://security.gentoo.org/glsa/201607-13</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 2016 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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