Advisory Details

August 10th, 2020

Advantech WebAccess/HMI Designer PM3 File Parsing Out-Of-Bounds Read Information Disclosure Vulnerability

ZDI-20-957
ZDI-CAN-10134

CVE ID CVE-2020-16211
CVSS SCORE 3.3, (AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N)
AFFECTED VENDORS Advantech
AFFECTED PRODUCTS WebAccess/HMI Designer
VULNERABILITY DETAILS

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Advantech WebAccess/HMI Designer. 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 the parsing of PM3 files. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of the current process.

ADDITIONAL DETAILS Advantech has issued an update to correct this vulnerability. More details can be found at:
https://us-cert.cisa.gov/ics/advisories/icsa-20-219-02
DISCLOSURE TIMELINE
  • 2020-02-18 - Vulnerability reported to vendor
  • 2020-08-10 - Coordinated public release of advisory
CREDIT kimiya
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