Trend Micro InterScan Web Security Virtual Appliance uihelper Privilege Escalation Vulnerability

March 30th, 2017
ZDI-17-225 ZDI-CAN-4385

CVE ID

CVSS Score

7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

Affected Vendors

Trend Micro

Affected Products

InterScan Web Security Virtual Appliance

Vulnerability Details


This vulnerability allows attackers to escalate privileges on vulnerable installations of Trend Micro InterScan Web Security Virtual Appliance. Authentication is required to exploit this vulnerability.

The specific flaw exists within the uihelper application. The issue lies in the default configuration that allows the iscan user to execute commands under different privileges. An attacker can leverage this flaw in conjunction with other vulnerabilities to execute arbitrary code in the context of root.

Additional Details

Trend Micro has issued an update to correct this vulnerability. More details can be found at:
https://success.trendmicro.com/solution/1116960

Disclosure Timeline

  • 2017-01-05 - Vulnerability reported to vendor
  • 2017-03-30 - Coordinated public release of advisory

Credit

Steven Seeley of Source Incite

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