TheGreenBow VPN Client Local Stack Overflow Vulnerability - Security Advisory - SOS-10-001 Release Date. 21-Jan-2010 Vendor Notification Date. 11-Dec-2009 Product. TheGreenBow VPN Client Platform. Microsoft Windows Affected versions. 4.65.003, 4.51.001 verified and possibly others. Severity Rating. High Impact. System access Attack Vector. Local Solution Status. Vendor patch CVE reference. Not yet assigned Details. TheGreenBow is an IPsec VPN client that sets up a secure channel for data transport. TheGreenBow VPN Client is vulnerable to a local stack based buffer overflow, which can lead to the compromise of a vulnerable system. The vulnerability is caused due to a boundary error when processing certain sections of tgb (policy) files. Passing an overly long string to "OpenScriptAfterUp" will trigger the overflow. Successful exploitation results in the execution of arbitrary code. Solution. A patch is available from the vendor (unverified) and will be included in the next release. Discovered by. Brett Gervasoni from SOS Labs. About us. Sense of Security is a leading provider of information security and risk management solutions. Our team has expert skills in assessment and assurance, strategy and architecture, and deployment through to ongoing management. We are Australia's premier application penetration testing firm and trusted IT security advisor to many of the countries largest organisations. Sense of Security Pty Ltd Level 3, 66 King St Sydney NSW 2000 AUSTRALIA T: +61 (0)2 9290 4444 F: +61 (0)2 9290 4455 W: http://www.senseofsecurity.com.au/consulting/penetration-testing E: info (at) senseofsecurity.com (dot) au [email concealed] Twitter: ITsecurityAU The latest version of this advisory can be found at: http://www.senseofsecurity.com.au/advisories/SOS-10-001.pdf Other Sense of Security advisories can be found at: http://www.senseofsecurity.com.au/research/it-security-advisories.php