Out today are multiple vulnerabilities from Cisco. There are patches available from Cisco to tackle data manipulation and denial of service issues in their IOS.
From Secunia:
Description:
Some vulnerabilities have been reported in Cisco IOS, which can be exploited by malicious people to disclose sensitive information, manipulate certain data, or to cause a DoS (Denial of Service).1) A memory leak exists in the handling of completed PPTP sessions, which can be exploited to exhaust memory on an affected system.
2) An error exists in the handling of PPTP sessions when virtual access interfaces are not removed from the interface descriptor block (IDB) and are not reused. This can result in an exhaustion of the interface descriptor block (IDB) limit.
Vulnerabilities #1 and #2 are reported in Cisco IOS versions prior to 12.3 with VPDN enabled.
3) Some errors exist in the Data-Link-Switching (DLSw) feature when processing UDP and IP protocol 91 packets. This can be exploited to cause a reload of the system or a memory leak.
4) An error exists in the processing of IPv6 packets, which can be exploited to prevent the interface from receiving additional traffic or to cause the device to crash (if RSVP service is configured on the interface) by sending a specially crafted IPv6 packet to the device.
Successful exploitation of this vulnerability requires that IPv6 and certain IPv4 UDP services are enabled.
5) An error exists in the implementation of Multicast Virtual Private Networks (MVPN), which can be exploited to create extra multicast states on the core routers via specially crafted Multicast Distribution Tree (MDT) Data Join messages. This can also be exploited to receive multicast traffic from VPNs that are not connected to the same Provider Edge (PE).
Successful exploitation of the multicast traffic leak requires that the attacker knows or guesses the Border Gateway Protocol (BGP) peering IP address of a remote PE router and the address of the multicast group that is used in other MPLS VPNs.
Ger yer patch on.
Summary
Name: Cross Site Scripting in CiscoWorks
Release Date: 05 December 2007
Reference: LSD001-2007
Discover: Dave Lewis
CVE Number: CVE-2007-5582
Vendor: Cisco
Systems Affected: CiscoWorks version 2.6 (as tested)
All prior builds are affected
Risk: Medium
Status: Published (Vendor Confirmed, Patch Available)
Description
The initial CiscoWorks login page is susceptible to XSS attack.
Impact: attackers could execute XSS attacks that can harvest session cookies and username/passwords.
TimeLine
Discovered: 20 August 2007
Reported: 24 September 2007
Fixed: 5 November 2007
Patch Release: 5 December 2007
Published: 5 December 2007
Technical Details
The application allows users to perform certain actions via HTTP requests without performing any validity checks to verify the request. Input is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user’s browser session.
Fix Information
This issue has now been resolved.
The patch may be obtained from:
http://www.cisco.com
Cisco Advisory
http://www.cisco.com/warp/public/707/cisco-sr-20071205-cw.shtml
I would like to thank Cisco for their prompt and professional response to this issue.
Liquidmatrix Security Digest
http://www.liquidmatrix.org/blog/
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Thanks: PortSwigger, Wade and pdp.
