Thanks Jason for your comprehensive advice. I tried to identify problem roots and I believe I find those files. And there is no problem so far. >From the beginning I am running tomcat service as user who cannot login to the system. Point 2 and 3 I have to do. But earlier our another serer running on port 80 severely damaged by hacker attack (web server). I will be keep in-touch on this. Any firewall you suggests? Also consider we have very narrow bandwidth; only 10 Mbps for 9 dhis2 systems with near about 12000 users average 300 concurrent user in top three systems; Updates we are run weekly basis. Point 6 and 7 I will do. How that will effect the system performance?
Regards Hannan On Thu, Feb 6, 2014 at 1:18 PM, Jason Pickering <[email protected] > wrote: > Hi Hannan, > I had several servers (4 to be exact) which were compromised due to a > vulnerability in Struts. Lars sent out an email a few weeks ago, that > informed everyone they needed to upgrade immediately. I know of other > server which have also been compromised. One was running Tomcat as root (an > exceptionally bad idea). Because of the compromise, a full reinstallation > of the server software would be required. > > In your case, it does seem to be a bit more serious, and not consistent > with the previous compromises I have seen. These compromises were limited > to the machine sending out a huge amount of traffic, but otherwise, there > did not "seem" to be any further issues. > > A few tips, you may want to consider > > 0) A complete reinstall of the system might be in order, given the extent > of the attack. > 1) Be sure that the Tomcat process is not running as root, and that the > user which can execute Tomcat cannot login to the system directly (i.e. has > their shell set to /bin/false) > 2) Close port 8080 and remove the Tomcat manager. Instead, only have port > 80/443 on the machine open. Additionally, do not run SSH on port 22, and > be sure that you can only login to the server with a key, which is > protected itself by a strong password. > 3) Consider attempting to look for vulnerabilities your self, with tools > such as Nessus and Nmap > 4) Ensure that you are running a firewall on the server itself, i.e. do > not trust your upstream providers firewall. > 5) Ensure that all Tomcat installs, Java,DHIS2 and the system software > itself is fully up to date > 6) Consider running an IDS such as OSSEC on your machine to look for > unauthorized intrusions. > 7) Use tools such as monit to monitor for spurious processes or suspicious > file activity. > > Hope this helps. > > Best regards, > Jason > > > > > > On Thu, Feb 6, 2014 at 8:36 AM, Hannan Khan <[email protected]> wrote: > >> Yes Morten, I installed through the package manager. >> >> The tomcat version is Apache Tomcat/7.0.26. >> >> Regards >> >> Hannan >> >> >> On Thu, Feb 6, 2014 at 12:07 PM, Morten Olav Hansen >> <[email protected]>wrote: >> >>> Also make sure that your tomcat is up to date.. there exists several >>> vulnerabilities in older versions >>> >>> (not sure how you installed it, but if you are using a linux >>> distribution, its wise to install it through the package manager) >>> >>> -- >>> Morten >>> >>> >>> On Thu, Feb 6, 2014 at 1:00 PM, Knut Staring <[email protected]> wrote: >>> >>>> Hannan, which build of DHIS2 ? Which Java version? Ubuntu? >>>> >>>> Sent from my mobile >>>> On Feb 6, 2014 6:29 AM, "Hannan Khan" <[email protected]> wrote: >>>> >>>>> Dear experts >>>>> >>>>> Our main DHIS2 implementation (mishealth) for the health sector was >>>>> hacked yesterday evening, around 4:30 PM local time. After login by any >>>>> user it showing the attached message. We immediately stop the tomact7 >>>>> service and check the database. We find the database is intact. >>>>> >>>>> After investigation I find that the hacker inserted three files to do >>>>> this. >>>>> >>>>> First file "index.html" contain an alert "alert("Admin, You Are Hacked >>>>> by Malaysia Hacker!")" and a body text <h1>Hacked by BadCat</h1>. Which >>>>> was placed in the application folder /tomcat7/webapps/mishealth/. >>>>> >>>>> Second files "index.html" contain another script which redirects to " >>>>> pastebin.com/raw.php?i=LZEdbBz6" was placed in >>>>> the /tomcat7/webapps/mishealth/dhis-web-commons/security/. >>>>> >>>>> Third file "guige.jsp" is contain a script was placed in >>>>> the /tomcat7/webapps/mishealth/dhis-web-commons/security/. >>>>> >>>>> For our server, it seems that only first file is executing after >>>>> login. I find few more suspicious files which I am investigating and will >>>>> share with the experts in next few days. >>>>> >>>>> I configured the server with only external open port is 8080. Other >>>>> two ports (SSH and WEBMIN) are open for internal IP only. External access >>>>> is possible only through VPN client. According to the firewall maintaining >>>>> vendor, that hacker might access through 8080. How we prevent and secure >>>>> that? >>>>> >>>>> I configure the database in other server and that server is only >>>>> accessible through one private IP block. The tomcat server, the backup >>>>> servers and our administrator/development team are in that block. >>>>> >>>>> Now please suggest how can we secure our servers more. >>>>> >>>>> Regards >>>>> >>>>> Muhammad Abdul Hannan Khan >>>>> -------------------------------------------------- >>>>> Senior Technical Advisor - HIS >>>>> Priority Area Health >>>>> Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH >>>>> House10/A, Road 90, Gulshan 2, Dhaka 1212, Bangladesh >>>>> >>>>> T +880-2- 8816459, 8816412 ext 118 >>>>> M+88 01819 239 241 >>>>> M+88 01534 312 066 >>>>> F +88 02 8813 875 >>>>> E [email protected] >>>>> S hannan.khan.dhaka >>>>> B hannan-tech.blogspot.com >>>>> >>>>> >>>> >>> >> >> _______________________________________________ >> Mailing list: https://launchpad.net/~dhis2-devs >> Post to : [email protected] >> Unsubscribe : https://launchpad.net/~dhis2-devs >> More help : https://help.launchpad.net/ListHelp >> >> >
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