22375 : Cisco Aironet Access Point ARP Memory Exhaustion DoS
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Info

Last Modified
about 1 year ago

Percent Complete
100%

Disclosure
Jan 12, 2006

Discovery
Unknown

Dates

Exploit
Unknown

Solution
Unknown

Keywords

 No Keywords

Description

 Cisco Aironet Access Points contain a flaw that may allow a remote denial of service. The issue is triggered when an attacker sends many spoofed ARP messages to the management interface of the AP, adding entries to the ARP table until the memory is exhausted, and will result in loss of availability for the AP until it is restarted.

Classification

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

Solution

 Upgrade to IOS version 12.3-7-JA2 or higher, as it has been reported to fix this vulnerability. In addition to the software upgrade, a configuration change is necessary: add the command L2-FILTER BLOCK-ARP to each radio interface.

It is also possible to correct the flaw by implementing the following workaround(s): Use VLANs to isolate wireless clients from the Access Point (AP) management interface.

Products
Cisco Systems, Inc.
Watch-list
Cisco Aironet Wireless Bridges
Watch-list
 1400 Series
Cisco Aironet Access Points
Watch-list
 1300 Series
1240AG Series
1230AG Series
1200 Series
1130AG Series
1100 Series
350 Series running IOS

References

Credit
  • Eric Smith - Bucknell University

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