====================================================================== Secunia Research 06/10/2005 - Webroot Desktop Firewall Two Vulnerabilities - ====================================================================== Table of Contents Affected Software....................................................1 Severity.............................................................2 Description of Vulnerability.........................................3 Solution.............................................................4 Time Table...........................................................5 Credits..............................................................6 References...........................................................7 About Secunia........................................................8 Verification.........................................................9 ====================================================================== 1) Affected Software Webroot Desktop Firewall Version 1.3.0 Build 43. Other versions may also be affected. ====================================================================== 2) Severity Rating: Less Critical Impact: Privilege escalation Security bypass Where: Local system ====================================================================== 3) Description of Vulnerability Secunia Research has discovered two vulnerabilities in Webroot Desktop Firewall, which can be exploited by malicious, local users to gain escalated privileges or bypass certain security restrictions. 1) A boundary error in PWIWrapper.dll when deleting a program from the list of "allowed" programs can cause a buffer overflow in FirewallNTService.exe. This can be exploited by sending a specially crafted application chain to the firewall driver via a DeviceIoControl() command, and then removing an "allowed" program from the firewall GUI. Successful exploitation allows non-privileged users to execute arbitrary code with SYSTEM privileges, but requires the the ability to add and remove programs from the firewall's permitted application list. 2) It is possible for non-privileged users to disable the firewall even when password protection has been enabled, by sending specific DeviceIoControl() commands to the firewall driver. ====================================================================== 4) Solution Update to version 1.3.0 build 52. ====================================================================== 5) Time Table 20/06/2005 - Initial vendor notification. 20/08/2005 - Initial vendor reply. 06/09/2005 - Vendor provided fixed version for testing. 06/10/2005 - Public disclosure. ====================================================================== 6) Credits Discovered by Tan Chew Keong, Secunia Research. ====================================================================== 7) References Webroot: http://support.webroot.com/ics/support/KBAnswer.asp?questionID=2332 ====================================================================== 8) About Secunia Secunia collects, validates, assesses, and writes advisories regarding all the latest software vulnerabilities disclosed to the public. These advisories are gathered in a publicly available database at the Secunia website: http://secunia.com/ Secunia offers services to our customers enabling them to receive all relevant vulnerability information to their specific system configuration. Secunia offers a FREE mailing list called Secunia Security Advisories: http://secunia.com/secunia_security_advisories/ ====================================================================== 9) Verification Please verify this advisory by visiting the Secunia website: http://secunia.com/secunia_research/2005-10/advisory/ Complete list of vulnerability reports published by Secunia Research: http://secunia.com/secunia_research/ ======================================================================