28776 : Cisco IOS VTP Revision Integer Wrap DoS
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
3	278	over 3 years ago	over 2 years ago	0 times	100%

Timeline

Disclosure Date
2006-09-13

Keywords

CSCse40078, CSCse47765

Description

A remote overflow exists in IOS and CatOS. VTP allows an attacker to specify the revision number of the VTP information, which an attacker can set to 0x7FFFFFFF. When an admin updates VLAN information, the revision is incremented to 0x80000000 resulting in an integer overflow. With a specially crafted packet, an attacker can cause denial of service by blocking communication of VLAN changes resulting in a loss of availability.

Classification

Location: Remote / Network Access
Attack Type: Denial of Service, Input Manipulation
Impact: Loss of Availability
Exploit: Exploit Unknown
Disclosure: OSVDB Verified

Solution

Upgrade to version recommended by Cisco TAC, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

Products

Cisco Systems, Inc.	CatOS	Unspecified
Cisco Systems, Inc.	IOS	12.1(19)

References

Security Tracker: 1016843
CERT VU: 175148
Bugtraq ID: 19998
CVE ID: 2006-4775 (see also: NVD)
Secunia Advisory ID: 21896 21902
SCIP VulDB ID: 2541
Related OSVDB ID: 28775 28777
ISS X-Force ID: 28925
VUPEN Advisory: ADV-2006-3600
Keyword: CSCse40078,CSCse47765
Mail List Post: http://archives.neohapsis.com/archives/bugtraq/2006-09/0205.html
http://archives.neohapsis.com/archives/bugtraq/2006-09/0219.html
Vendor Specific Advisory URL: http://www.cisco.com/warp/public/707/cisco-sr-20060913-vtp.shtml
Other Advisory URL: http://www.phenoelit.de/stuff/CiscoVTP.txt

Credit

FX - fxphenoelit.de - Phenoelit Group

CVSSv2 Score

CVSSv2 Base Score = 7.8
Source: nvd.nist.gov | Generated: 2006-09-18 | Disagree?

Blogs

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This section lists the latest news and blogs found via the daylife API (and for older items, the technorati API), which mention or otherwise discuss this vulnerability.

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