MS07-017 is not categorized as virus, worm, Trojan or backdoor. It is a group of critical vulnerabilities in the Graphics Device Interface (GDI) on Windows Vista/2003/XP/2000 computers, which allows to execute remote code, perform a local privilege escalation and denial of service attack in the vulnerable computer.
If exploited successfully, MS07-017 allows hackers to carry out the following actions:
- Gain remote control of the affected computer with the same privileges as the logged on user. If this user had administrator rights , the hacker could take complete control of the system: create, modify or delete files, install programs, create new user accounts, etc.
- Gain unauthorized privileges on a computer or network. An example of privilege elevation would be an unprivileged user who could manage to be added to the Administrator's group. In such case, the hacker could take complete control of the system: create, modify or delete files, install programs, create new user accounts, etc.
- Launch Denial of Service attacks, which could cause the affected system to stop responding.
Some of these vulnerabilities are exploited by creating a specially creafted website and enticing users into visiting it, or by sending a specially crafted email to a vulnerable computer.
In order to exploit other vulnerabilities, the attacking user must be able to log on locally on the vulnerable system, and then run a specially crafted program.
If you have a Windows Vista/2003/XP/2000 computer, it is recommended to download and apply the security patch for these vulnerabilities. Access the web page for downloading the patch.