Users login

Create an account »

JOIN XATRIX

Users login

Home » Hacking News » ZoneAlarm Pro Denial of Service Vulnerability

ZoneAlarm Pro Denial of Service Vulnerability

by Nikola Strahija on October 16th, 2002 NSSI Technologies Inc Research Labs Security Advisory http://www.nssolution.com (Philippines / .ph) "Maximum e-security" http://nssilabs.nssolution.com ZoneAlarm Pro 3.1 and 3.0 Denial of Service Vulnerability Author: Abraham Lincoln Hao / SunNinja


Tested: Under Win2k Advance Server with SP3 / WinNT 4.0 with SP6a / Win2K Professional / WinNT 4.0 workstation

Vendor Status: Zone Labs is already contacted 1 month ago and they informed me that they going to release an update or new version to patched the problem. This vulnerability is confirmed by the vendor.

Vendors website: http://www.zonelabs.com

Severity: High

Overview:

New ZoneAlarm® Pro delivers twice the security—Zone Labs’ award-winning, personal firewall trusted by millions, plus advanced privacy features. the award-winning PC firewall that blocks intrusion attempts and protects against Internet-borne threats like worms, Trojan horses, and spyware.

ZoneAlarm Pro 3.1 and 3.0 doubles your protection with enhanced Ad Blocking and expanded Cookie Control to speed up your Internet experience and stop Web site spying. Get protected. Compatible with Microsoft® Windows® 98/Me/NT/2000 and XP.

ZoneAlarm Pro 3.1.291 and 3.0 contains vulnerability that would let the attacker consume all your CPU and Memory usage that would result to Denial of Service Attack through sending multiple syn packets / synflooding.

Details:

Zone-Labs ZoneAlarm Pro 3.1.291 and 3.0 contains a vulnerability that would let the attacker consume all your CPU and Memory usage that would result to Denial of Service Attack through Synflooding that would cause the machine to stop from responding. Zone-Labs ZoneAlarm Pro 3.1.291 and 3.0 is also vulnerable with IP Spoofing. This Vulnerabilities are confirmed from the vendor.

Test diagram:

[*Nix b0x with IP Spoofing scanner / Flooder] <===[10/100mbps switch===> [Host with ZoneAlarm]

1] Tested under default install of the 2 versions after sending minimum of 300 Syn Packets to port 1-1024 the machine will hang-up until the attack stopped.

2] We configured the ZoneAlarm firewall both version to BLOCK ALL traffic setting after sending a minimum of 300 Syn Packets to port 1-1024 the machine will hang-up until the attack stopped.

Workaround:

Disable ZoneAlarm and Hardened TCP/IP stack of your windows and Install latest Security patch.

Note: To people who's having problem reproducing the vulnerability let me know :)

Any Questions? Suggestions? or Comments? let us know.

e-mail: [email protected] / [email protected] / [email protected]




Newsletter signup

Signup to our monthly newsletter and stay in touch with IT news!

Free E-books

We've got ebooks! But they're not online. :( Please give us a few days to bring downloads back.

Contact

Have something to say or just wanna drop us a line? Please keep this in mind: to spam, we reply with spam.

Contact us »