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Computer Associates eTrust EZ Antivirus is "antivirus protection software for home and business use. It provides complete protection, detection and elimination of thousands of computer viruses, worms, and Trojan Horse programs".
Local exploitation of an insecure permission vulnerability in Computer Associates eTrust EZ Antivirus allows attackers to escalate privileges or disable protection. |
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Credit:
The information has been provided by iDEFENSE.
The original article can be found at: http://www.idefense.com/application/poi/display?id=164&type=vulnerabilities
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Vulnerable Systems:
* eTrust EZ Antivirus version 7.0.1.4
* eTrust EZ Antivirus version 7.0.0 up to 7.0.4
Immune Systems:
* eTrust EZ Antivirus version 7.0.5
Computer Associates eTrust EZ Antivirus is a product used to protect a personal computer from virus infections. The vulnerability specifically exists in the default file Access Control List (ACL) settings that are applied during installation. When an administrator installs eTrust EZ Antivirus, the default ACL allows any user to modify the installed files. Because of the fact that some of the programs run as system services, a user can simply replace an installed eTrust EZ Antivirus file with their own malicious code that will later be executed with system privileges. One such file that would be a target for this is VetMsg.exe.
Analysis:
Successful exploitation allows local attackers to escalate privileges to the system level. It is also possible to use this vulnerability to simply disable protection by moving all of the executable files so that they cannot start upon a reboot.
Workaround:
Apply proper Access Control List settings to the directory that eTrust EZ Antivirus is installed in. The ACL rules should make sure that no regular users can modify files in the directory.
Vendor Response:
"With the assistance of iDEFENSE, Computer Associates has identified a medium-risk vulnerability in the installation and updating components of eTrustTM EZ Antivirus which may allow a local user to escalate their user privileges on a PC and disable protection.
Effected generally available releases of eTrust EZ Antivirus include:
* eTrust EZ Antivirus r7.0.0 - r7.0.4 installed on PC's
- running Windows NT, 2000 or XP
- with NTFS formatted drives
Computer Associates has actively addressed this issue in eTrust EZ Antivirus r7.0.5 and above.
More information about this vulnerability and instructions on how to upgrade to the latest version of eTrust EZ Antivirus can be found at: http://crm.my-etrust.com/login.asp?username=guest&target=DOCUMENT&openparameter=2222
At Computer Associates, we take every report of exposure with the utmost urgency, to ensure that no customer is left in a vulnerable situation. We have assigned this vulnerability the ID number 32054."
CVE Information:
CAN-2004-1149
Disclosure Timeline:
10/26/2004 - Initial vendor notification
10/29/2004 - Initial vendor response
12/15/2004 - Coordinated public disclosure
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