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Apple Security Advisory 2011-11-10-2

Apple Security Advisory 2011-11-10-2
Posted Nov 15, 2011
Authored by Apple | Site apple.com

Apple Security Advisory 2011-11-10-2 - Time Capsule and AirPort Base Station (802.11n) Firmware 7.6 is now available and addresses a security vulnerability. dhclient allowed remote attackers to execute arbitrary commands via shell metacharacters in a hostname obtained from a DHCP message. This issue is addressed by stripping shell meta-characters in dhclient-script.

tags | advisory, remote, arbitrary, shell
systems | apple
advisories | CVE-2011-0997
SHA-256 | 6e8e307de2ea87a65b2fbe4858a5cdefa741c0cb65ec28c910798ebd7cbf3bd9

Apple Security Advisory 2011-11-10-2

Change Mirror Download
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

APPLE-SA-2011-11-10-2 Time Capsule and AirPort Base Station (802.11n)
Firmware 7.6

Time Capsule and AirPort Base Station (802.11n) Firmware 7.6 is now
available and addresses the following:

Available for: AirPort Extreme Base Station with 802.11n,
AirPort Express Base Station with 802.11n, Time Capsule
Impact: An attacker in a privileged network position may be able to
cause arbitrary command execution via malicious DHCP responses
Description: dhclient allowed remote attackers to execute arbitrary
commands via shell metacharacters in a hostname obtained from a DHCP
message. This issue is addressed by stripping shell meta-characters
in dhclient-script.
CVE-ID
CVE-2011-0997 : Sebastian Krahmer and Marius Tomaschewski of the SUSE
Security Team working with ISC


Installation note for Firmware version 7.6

Firmware version 7.6 is installed into Time Capsule or AirPort Base
Station with 802.11n via AirPort Utility, provided with the device.

It is recommended that AirPort Utility 5.5.3 or later be installed
before upgrading to Firmware version 7.6.

AirPort Utility 5.5.3 or later may be obtained through Apple's
Software Download site: http://www.apple.com/support/downloads/

Information will also be posted to the Apple Security Updates
web site: http://support.apple.com/kb/HT1222

This message is signed with Apple's Product Security PGP key,
and details are available at:
https://www.apple.com/support/security/pgp/

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