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Cisco Security Advisory 20120926-dhcp

Cisco Security Advisory 20120926-dhcp
Posted Sep 27, 2012
Authored by Cisco Systems | Site cisco.com

Cisco Security Advisory - Cisco IOS Software contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. An attacker could exploit this vulnerability by sending a single DHCP packet to or through an affected device, causing the device to reload. Cisco has released free software updates that address this vulnerability. A workaround that mitigates this vulnerability is available.

tags | advisory, remote, denial of service
systems | cisco
SHA-256 | fa62901858ad68bb5196e039df077aa95c4bea884d3ae32d63859f012838d86b

Cisco Security Advisory 20120926-dhcp

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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

Cisco IOS Software DHCP Denial of Service Vulnerability

Advisory ID: cisco-sa-20120926-dhcp

Revision 1.0

For Public Release 2012 September 26 16:00 UTC (GMT)
+---------------------------------------------------------------------

Summary
=======

Cisco IOS Software contains a vulnerability that could allow an
unauthenticated, remote attacker to cause a denial of service (DoS)
condition. An attacker could exploit this vulnerability by sending a
single DHCP packet to or through an affected device, causing the
device to reload.

Cisco has released free software updates that address this
vulnerability. A workaround that mitigates this vulnerability is
available. This advisory is available at the following link:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120926-dhcp

Note: The September 26, 2012, Cisco IOS Software Security Advisory
bundled publication includes 9 Cisco Security Advisories. Eight of the
advisories address vulnerabilities in Cisco IOS Software, and one
advisory addresses a vulnerability in Cisco Unified Communications
Manager. Each Cisco IOS Software Security Advisory lists the Cisco IOS
Software releases that correct the vulnerability or vulnerabilities
detailed in the advisory as well as the Cisco IOS Software releases
that correct all Cisco IOS Software vulnerabilities in the September
2012 bundled publication.

Individual publication links are in "Cisco Event Response: Semi-Annual
Cisco IOS Software Security Advisory Bundled Publication" at the
following link:

http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep12.html

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