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TUCoPS :: Cisco :: cisco5~1.htm

Cisco Catalyst 2900XL - crash with an empty UDP packet



Vulnerability

    Cisco

Affected

    Cisco Catalyst 2900XL

Description

    'bash' found  following.   It's possible  to crash  Cisco Catalyst
    2900XL with a empty UDP packet to port 161 when SNMP is  disabled.
    (Other switches also?)

    The  crash  only  occurs  when  the  switch  is  booted  with SNMP
    disabled.  Seems that SNMP is listening, even if SNMP is disabled.

    This has been  only tested with  Software Version 12.0(5.2)XU,  on
    WS-C2924C-XL-EN switch.

    A simple empty UDP packet sender included.

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    -----

Solution

    Enable SNMP, or enable SNMP and then disable SNMP.


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