[gentoo-announce] [ GLSA 201309-21 ] klibc: Command Injection

[news 28]

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Gentoo Linux Security Advisory GLSA 201309-21

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http://security.gentoo.org/

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Severity: Normal

Title: klibc: Command Injection

Date: September 26, 2013

Bugs: #369075

ID: 201309-21

 

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Synopsis

========

 

A vulnerability in klibc could allow remote attackers to execute

arbitrary shell code.

 

Background

==========

 

klibc is a minimalistic libc used for making an initramfs.

 

Affected packages

=================

 

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

Package / Vulnerable / Unaffected

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

1 dev-libs/klibc < 1.5.25 >= 1.5.25

 

Description

===========

 

The ipconfig utility in klibc writes DHCP options to

/tmp/net-$DEVICE.conf, and this file is later sourced by other scripts

to get defined variables. The options written to this file are not

properly escaped.

 

Impact

======

 

A remote attacker could send a specially crafted DHCP reply, which

could execute arbitrary shell code with the privileges of any process

which sources DHCP options.

 

Workaround

==========

 

There is no known workaround at this time.

 

Resolution

==========

 

All klibc users should upgrade to the latest version:

 

# emerge --sync

# emerge --ask --oneshot --verbose ">=dev-libs/klibc-1.5.25"

 

References

==========

 

[ 1 ] CVE-2011-1930

http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-1930

 

Availability

============

 

This GLSA and any updates to it are available for viewing at

the Gentoo Security Website:

 

http://security.gentoo.org/glsa/glsa-201309-21.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 ( -at -) gentoo.org or alternatively, you may file a bug at

https://bugs.gentoo.org.

 

License

=======

 

Copyright 2013 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