Advisory Details

May 4th, 2018

Wecon LeviStudioU DataLogTool History Curve Set Stack-based Buffer Overflow Code Execution Vulnerability

CVE ID	CVE-2018-7527
CVSS SCORE	4.6, AV:L/AC:L/Au:N/C:P/I:P/A:P
AFFECTED VENDORS	Wecon
AFFECTED PRODUCTS	LeviStudio
VULNERABILITY DETAILS	This vulnerability allows attackers to execute arbitrary code on vulnerable installations of Wecon LeviStudioU. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within DataLogTool.exe. During the History Curve Set procedure, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code under the context of the current process.
ADDITIONAL DETAILS	Wecon has issued an update to correct this vulnerability. More details can be found at: https://ics-cert.us-cert.gov/advisories/ICSA-18-116-02
DISCLOSURE TIMELINE	2017-12-21 - Vulnerability reported to vendor 2018-05-04 - Coordinated public release of advisory 2018-05-04 - Advisory Updated
CREDIT	Sergey Zelenyuk of RVRT

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