On 02/09/2011 14:33, Edward Quick wrote: > Thanks Mark. The report says this makes (previous versions of) Apache Tomcat > vulnerable to an authentication bypass and information disclosure, so I'm was > just trying to understand how the example demonstrates that?
The example shows that Tomcat process an AJP message that was entirely controlled by the attacker rather than the reverse proxy. Tomcat trusts that information in the AJP message (authenticated user name, client IP address, etc) are correct. If an attacker can control the AJP message then things like authentication or filters based on client IP address etc can all be bypassed. Additionally, processing this extra request can cause Tomcat to start mixing up responses to requests. Mark > > -----Original Message----- > From: Mark Thomas [mailto:ma...@apache.org] > Sent: 02 September 2011 14:18 > To: Tomcat Users List > Subject: Re: Bug 51698 - ajp CPing/Forward-Request packet forgery > > On 02/09/2011 14:12, Edward Quick wrote: >> Hi there, >> >> I was testing out the packet forgery example (at >> https://issues.apache.org/bugzilla/show_bug.cgi?id=51698) >> to see if my site was vulnerable and got the following results. >> I'm not sure looking at the code comments in >> ForwardRequestForgeryExample.java >> if the output below means it's vulnerable and what exactly that exploited. > > Yes, you are vulnerable. > > The attack exploits a bug in the AJP connector you have configured. > >> Could someone give me a hand please? > > See above. > > Mark > >> >> Thanks, >> >> Ed. >> >> C:>java -cp . ForwardRequestForgeryExample >> Sending AJP Forward-Request Packet... >> End >> >> $ tail -f catalina.out >> Invoke HelloWorldExample.doPost method: >> ------------------------------------------- >> Host: my.evil-site.com >> RemoteAddr: 1.2.3.4 >> LocalPort: 999 >> woo: I am here >> >> >> >> >> >> ________________________________ >> The information contained in this email is strictly confidential and for the >> use of the addressee only, unless otherwise indicated. If you are not the >> intended recipient, please do not read, copy, use or disclose to others this >> message or any attachment. Please also notify the sender by replying to this >> email or by telephone (+44 (0)20 7896 0011) and then delete the email and >> any copies of it. Opinions, conclusions (etc) that do not relate to the >> official business of this company shall be understood as neither given nor >> endorsed by it. IG Group Holdings plc is a company registered in England and >> Wales under number 01190902. VAT registration number 761 2978 07. Registered >> Office: Cannon Bridge House, 25 Dowgate Hill, London EC4R 2YA. Authorised >> and regulated by the Financial Services Authority. FSA Register number >> 114059. >> > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
