Secunia Security Advisory - A vulnerability has been reported in Cisco IOS and IOS XR, which can be exploited by malicious people to potentially disclose sensitive information or to cause a DoS (Denial of Service).
819f17283035dc842da7be676419239c798cd648630d2bf7c54519f067e70543
----------------------------------------------------------------------
BETA test the new Secunia Personal Software Inspector!
The Secunia PSI detects installed software on your computer and
categorises it as either Insecure, End-of-Life, or Up-To-Date.
Effectively enabling you to focus your attention on software
installations where more secure versions are available from the
vendors.
Download the free PSI BETA from the Secunia website:
https://psi.secunia.com/
----------------------------------------------------------------------
TITLE:
Cisco IOS IPv6 Routing Header Information Disclosure and Denial of
Service
SECUNIA ADVISORY ID:
SA26359
VERIFY ADVISORY:
http://secunia.com/advisories/26359/
CRITICAL:
Moderately critical
IMPACT:
Exposure of sensitive information, DoS
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 12.x
http://secunia.com/product/182/
DESCRIPTION:
A vulnerability has been reported in Cisco IOS and IOS XR, which can
be exploited by malicious people to potentially disclose sensitive
information or to cause a DoS (Denial of Service).
The vulnerability is caused due to an error when processing IPv6
packets with a Type 0 routing header. This can lead to disclosure of
16 bytes of packet buffer memory in the destination IPv6 address in a
IPv6 packet header, and can also be exploited to crash an IOS device
or the IPv6 subsystem on devices running Cisco IOS XR by sending a
specially crafted IPv6 packet.
Successful exploitation requires that the device is configured to use
IPv6.
The following products are reportedly not affected:
* Cisco PIX and ASA Appliances
* Cisco Firewall Services Module (FWSM)
* Cisco MDS
SOLUTION:
Apply updated versions. See vendor advisory for more details.
Filter packets that contain Type 0 routing headers. See Workarounds
section in vendor advisory.
PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor, who also credits Tom Cross, IBM ISS X-Force.
ORIGINAL ADVISORY:
http://www.cisco.com/warp/public/707/cisco-sa-20070808-IOS-IPv6-leak.shtml
----------------------------------------------------------------------
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.
----------------------------------------------------------------------