avast! Antivirus installation files insecure permissions
| avast-default-insecure-permissions (25336) |  Medium Risk |
Description:
avast! Antivirus could allow a local attacker to gain elevated privileges. Insecure default permissions are assigned to all files in the avast! program directory during installation. This could allow an attacker to gain elevated privileges on the system by replacing the avast! system service file with a trojan, which would be executed with SYSTEM privileges when the system is rebooted or the service is restarted.
Note: The TEMP directory must be in the same directory as the installation directory for successful exploitation.
Consequences:
Gain Privileges
Remedy:
Upgrade to the latest version of avast! Antivirus (4.7.819 or later), available from the avast! Antivirus Web site. See References.
References:
- alwil software Web site: avast! 4 Professional Edition.
- BID-17158: Avast! Antivirus Local Insecure Permissions Vulnerability
- CVE-2006-1355: avast! Antivirus 4.6.763 and earlier sets BUILTIN\Everyone permissions to critical system files in the installation folder, which allows local users to gain privileges or disable protection by modifying those files.
- SA19284: avast! Antivirus Insecure Default File Permissions
- VUPEN/ADV-2006-1011: avast! Antivirus Installation Insecure Default File Permissions Vulnerability
Platforms Affected:
- Alwil avast! 4.6.763 db 612-0 Professional
- Alwil avast! Home
Reported:
Mar 20, 2006
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