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Inspector.

The Secunia Software Inspector is a free service that detects insecure
versions of software that you may have installed in your system. When
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secure version from the vendor.

Try it out online:
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TITLE:
Cisco IOS Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA23867

VERIFY ADVISORY:
http://secunia.com/advisories/23867/

CRITICAL:
Highly critical

IMPACT:
DoS, System access

WHERE:
>From remote

OPERATING SYSTEM:
Cisco IOS XR 3.x
http://secunia.com/product/4907/
Cisco IOS R12.x
http://secunia.com/product/50/
Cisco IOS R11.x
http://secunia.com/product/53/
Cisco IOS 12.x
http://secunia.com/product/182/
Cisco IOS 11.x
http://secunia.com/product/183/
Cisco IOS 10.x
http://secunia.com/product/184/

DESCRIPTION:
Some vulnerabilities have been reported in Cisco IOS, which can be
exploited by malicious people to cause a DoS (Denial of Service) and
potentially compromise a vulnerable system.

1) An error exists in the processing of IP options in various IP
packets (including some ICMP requests, PIMv2, PGM, and URD requests).
This can be exploited to restart the device or ipv4_io process or
potentially execute arbitrary code via a specially crafted IP Option
field in a packet sent to a physical or virtual IPv4 address
configured on the device.

2) A memory leak error in the processing of TCP packets can be
exploited to cause the device to consume a large amount of memory
over time and may lead to a degraded service via a specially crafted
packet sent to a physical or virtual IPv4 address configured on the
device.

3) An error in the processing of IPv6 Type 0 Routing headers can be
exploited to crash the device via a specially crafted packet sent to
an IPv6 address defined on the device.

Successful exploitation of this vulnerability requires that IPv6 is
enabled.

SOLUTION:
Update to the latest version (please see the vendor's advisory for
details).

PROVIDED AND/OR DISCOVERED BY:
1) Reported by the vendor.
2) Reported by the vendor.
3) Arnaud Ebalard, EADS Corporate Research Center.

ORIGINAL ADVISORY:
Cisco Systems:
http://www.cisco.com/warp/public/707/cisco-sa-20070124-bundle.shtml
http://www.cisco.com/warp/public/707/cisco-sa-20070124-crafted-ip-option.shtml
http://www.cisco.com/warp/public/707/cisco-sa-20070124-crafted-tcp.shtml
http://www.cisco.com/warp/public/707/cisco-sa-20070124-IOS-IPv6.shtml

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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