Gentoo: tcpdump denial of service
Posted by LinuxSecurity.com Team   
Gentoo A vulnerability exists in the parsing of ISAKMP packets (UDP port 500) that allows an attacker to force TCPDUMP into an infinite loop upon receipt of a specially crafted packet.

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GENTOO LINUX SECURITY ANNOUNCEMENT 200303-5
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          PACKAGE : tcpdump
          SUMMARY : remote dos
             DATE : 2003-03-05 10:19 UTC
          EXPLOIT : remote
VERSIONS AFFECTED : <3.7.2
    FIXED VERSION : =>3.7.2
              CVE : CAN-2003-0108

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- From advisory:

"A vulnerability exists in the parsing of ISAKMP packets (UDP port 500)
that allows an attacker to force TCPDUMP into an infinite loop upon
receipt of a specially crafted packet."

Read the full advisory at: 
http://www.idefense.com/advisory/02.27.03.txt

SOLUTION

It is recommended that all Gentoo Linux users who are running
net-analyzer/tcpdump upgrade to tcpdump-3.7.2 as follows:

emerge sync
emerge -u tcpdump
emerge clean

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aliz@gentoo.org - GnuPG key is available at  http://cvs.gentoo.org/~aliz
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