Advantech WebAccess Remote Authentication Bypass Vulnerability
July 18th, 2014
Vulnerability Details
This vulnerability allows remote attackers to bypass authentication requirements on vulnerable installations of Advantech WebAccess. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the ChkCookieNoRedir function. By providing arbitrary values to certain fields, an attacker can receive a session authentication cookie despite receiving an error message.
Additional Details
Advantech has issued an update to correct this vulnerability. More details can be found at:
http://ics-cert.us-cert.gov/advisories/ICSA-14-198-02
Disclosure Timeline
- 2014-04-23 - Vulnerability reported to vendor
- 2014-07-18 - Coordinated public release of advisory
Credit
John Leitch
