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Secunia Advisory SA14904

Cisco Various Products ICMP Message Handling Denial of Service
Secunia Advisory SA14904
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Release Date 2005-04-12
Last Update 2005-04-13
   
Popularity 22,521 views
Comments 0 comments

Criticality level Less criticalLess critical
Impact DoS
Where From remote
Authentication level Available in Customer Area
   
Report reliability Available in Customer Area
Solution Status Partial Fix
   
Systems affected Available in Customer Area
Approve distribution Available in Customer Area
   
Operating System
Cisco Content Services Switch 11000 Series (WebNS)
Cisco IOS 10.x
Cisco IOS 11.x
Cisco IOS 12.x
Cisco IOS R11.x
Cisco IOS R12.x
Cisco IOS XR 3.x
Cisco ONS 15000 Series
Cisco PIX 6.x
Cisco SAN-OS 1.x (MDS 9000 Switches)

Secunia CVSS Score Available in Customer Area
CVE Reference(s) CVE-2004-0790 CVSS available in Customer Area
CVE-2004-0791 CVSS available in Customer Area
CVE-2004-1060 CVSS available in Customer Area
  

Description

Fernando Gont has published an Internet-Draft describing how ICMP (Internet Control Message Protocol) can be exploited by malicious people to cause a DoS (Denial of Service). Cisco has acknowledged that various Cisco products are affected.

The published Internet-Draft details three types of attacks, which utilize the following ICMP messages to cause a negative impact on TCP connections either terminating or originating from a vulnerable device.

1) ICMP "hard" error messages
2) ICMP "fragmentation needed and Don't Fragment (DF) bit set" messages (known as PMTUD attacks)
3) ICMP "source quench" messages

These attacks can all be exploited to cause TCP connection resets, reduce the throughput in existing TCP connections, or consume large amounts of CPU and memory resources.

Successful exploitation requires knowledge of IP address information of the source and destination of the TCP network connection..

NOTE: See the original advisory for a list of affected versions.


Solution
See patch matrix in vendor advisory for information about fixes.
Further details available in Customer Area

Provided and/or discovered by
Fernando Gont

Changelog
Further details available in Customer Area

Original Advisory
Cisco:
http://www.cisco.com/warp/public/707/cisco-sa-20050412-icmp.shtml

NISCC:
http://www.niscc.gov.uk/niscc/docs/al-20050412-00308.html

ICMP attacks against TCP:
http://www.gont.com.ar/drafts/icmp-attacks-against-tcp.html

Other references
Further details available in Customer Area

Deep Links
Links available in Customer Area


Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Cisco Various Products ICMP Message Handling Denial of Service
 
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