28776 : Cisco IOS VTP Revision Integer Wrap DoS
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Info

Last Modified
about 1 year ago

Percent Complete
100%

Disclosure
Sep 13, 2006

Discovery
Unknown

Dates

Exploit
Unknown

Solution
Unknown

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 Required
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.
Watch-list
CatOS
Watch-list
 Unspecified
IOS
Watch-list
 12.1(19)

References

Credit
  • FX - fxBrand New Doo Doophenoelit.de - Phenoelit Group

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