CVE-2014-0773: advantech advantech_webaccess Command Injection

Vulnerability summary

CVE-2014-0773 is a high (CVSS 7.5) Command Injection vulnerability in advantech advantech_webaccess. EPSS estimates a 2.52% chance of exploitation in the next 30 days, higher than 84.6% of scored vulnerabilities.

Timeline

1. 12-04-2014
   PublishedVulnerability first disclosed.
2. 19-09-2025
   Last modifiedVulnerability information updated.

Description

The BWOCXRUN.BwocxrunCtrl.1 control contains a method named “CreateProcess.” This method contains validation to ensure an attacker cannot run arbitrary command lines. After validation, the values supplied in the HTML are passed to the Windows CreateProcessA API. The validation can be bypassed allowing for running arbitrary command lines. The command line can specify running remote files (example: UNC command line). A function exists at offset 100019B0 of bwocxrun.ocx. Inside this function, there are 3 calls to strstr to check the contents of the user specified command line. If “\setup.exe,” “\bwvbprt.exe,” or “\bwvbprtl.exe” are contained in the command line (strstr returns nonzero value), the command line passes validation and is then passed to CreateProcessA.

• CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.