Cisco IOS vulnerability

From: Gustavo Kruel (gkruelat_private)
Date: Thu Jul 17 2003 - 07:14:01 PDT

  • Next message: Johnson, April: "Cisco IOS Denial of Service that affects most Cisco IOS routers- requires power cycle to recover"

    Hi all.
    
    I saw today the vulnerability alert on Cisco IOS. The workaround is to
    implement ACL?s that block packets from unknown sources directed to an
    exposed interface.
    
    Thinking about a perimeter router, i have one router with a "tcp any any
    established" ACL. I also have ICMP opened in this same router, any -> any.
    Are this lines enough to make this interface vulnerable to the possible
    attack?
    
    What do you think about it?
    
    
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