Advisory Details

June 20th, 2019

Phoenix Contact Automationworx BCP File Parsing Use-After-Free Remote Code Execution Vulnerability

ZDI-19-578
ZDI-CAN-7780

CVE ID CVE-2019-12871
CVSS SCORE 7.8, (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
AFFECTED VENDORS Phoenix Contact
AFFECTED PRODUCTS Automationworx
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Phoenix Contact Automationworx. 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 BCP files. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the current process.

ADDITIONAL DETAILS Phoenix Contact has issued an update to correct this vulnerability. More details can be found at:
https://cert.vde.com/en-us/advisories/vde-2019-014
DISCLOSURE TIMELINE
  • 2019-03-06 - Vulnerability reported to vendor
  • 2019-06-20 - Coordinated public release of advisory
CREDIT kimiya, rgod, mdm of 9sg Security Team
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