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Quarkslab’s Writeup on Common Router Bug TCP 32764, Cisco Just Released Patch For Their Devices

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Quarkslab’s Writeup on Common Router Bug TCP 32764, Cisco Just Released Patch For Their Devices

Carlos Ageng'o by Carlos Ageng'o
January 23, 2014
in News
Reading Time: 2 mins read
248
0

antz
Not long ago, it was discovered that Cisco SMB devices contain a root level security hole. The bug was classified as a serious threat, scoring a 10 on the CVSS. Eloi Vanderbéken published a range of devices with the same issue on GitHub including some POC code to exploit this hole. A method for patching Netgear devices was pubished by at the ShinyNightMares blog.

No authentication was required for this backdoor allowing for the attacker to execute remote commands, namely:

  • remote root shell
  • NVRAM configuration dump: Wifi and/or PPPoE credentials can be extracted for instance
  • file copy

The level of scans being conducted in the wild for TCP 32764 has increased in recent times – probably some bots preying on this low hanging fruit. Quarkslab fix for the problem follows the same path that would be used by potential attackers: get a remote root shell, dump NVRAM configs and patch the root image.

A complete writeup can be found here.

At the same time, Cisco has released a patch for their SMB devices as can be seen in this recent tweet:

@techweez Just Released! Fix for the Unauthorized Access Vulnerability in WAP4410N – http://t.co/v5VlRdYoIh #cisco #fix

— Cisco SB Support (@CiscoSBsupport) January 23, 2014

Tags: Cisco
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Carlos Ageng'o

Carlos Ageng'o

Bringing you news on information systems, business intelligence and IT innovations. Contact me on @aKhadiemik and c [dot] agengo [at] techweez [dot] com

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