Advisory Details

July 18th, 2014

Advantech WebAccess Remote Authentication Bypass Vulnerability

ZDI-14-249
ZDI-CAN-2079

CVE ID CVE-2014-2367
CVSS SCORE 7.5, (AV:N/AC:L/Au:N/C:P/I:P/A:P)
AFFECTED VENDORS Advantech
AFFECTED PRODUCTS Advantech WebAccess
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 13447. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
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
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