Advisory Details

November 24th, 2013

ABB MicroSCADA Wserver wserver.exe EXECUTE Remote Code Execution Vulnerability

ZDI-13-270
ZDI-CAN-1785

CVE ID
CVSS SCORE 7.5, AV:N/AC:L/Au:N/C:P/I:P/A:P
AFFECTED VENDORS ABB
AFFECTED PRODUCTS MicroSCADA
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID ['13138']. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of ABB MicroSCADA Wserver. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the wserver.exe component which listens on TCP port 12221. This component user-supplied data directly to a CreateProcessA call. By supplying a UNC path to a controlled binary a remote attacker can execute arbitrary code under the context of the vulnerable process.
ADDITIONAL DETAILS ABB has issued an update to correct this vulnerability. More details can be found at:
http://www05.abb.com/global/scot/scot229.nsf/veritydisplay/41ccfa8ccd0431e6c1257c1200395574/$file/ABB_SoftwareVulnerabilityHandlingAdvisory_ABB-VU-PSAC-1MRS235805.pdf
DISCLOSURE TIMELINE
  • 2013-02-13 - Vulnerability reported to vendor
  • 2013-11-24 - Coordinated public release of advisory
CREDIT Brian Gorenc
HP Zero Day Initiative
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