Title: AIX Filtering Vulnerability
Severity: HIGH
Description:
The filtering modules for AIX 4.3.2 do not allow you to filter tcp port numbers higher than 32767. This example was in the BugTraq posting regarding this problem:
genfilt -v 4 -a D -s 0.0.0.0 -m 0.0.0.0 -d 0.0.0.0 -M 0.0.0.0 \ -c udp -o any -O eq -P 123 -l n -w I -i all
Works fine... but...
genfilt -v 4 -a D -s 0.0.0.0 -m 0.0.0.0 -d 0.0.0.0 -M 0.0.0.0 -c udp \ -o any -O eq -P 32768 -l n -w I -i all
Fails with: Bad destination port/ICMP type "32768".
It is believed that this problem is a result of incorrect type (short int) being used for the port number argument.
Compromise may occur through services listening on ports that are higher than 32767.
Affected Products:
- IBM AIX 4.3.2
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