Advisory Details

March 16th, 2022

Siemens Simcenter Femap BDF File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability

ZDI-22-509
ZDI-CAN-15061

CVE ID CVE-2021-46699
CVSS SCORE 7.8, (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
AFFECTED VENDORS Siemens
AFFECTED PRODUCTS Simcenter Femap
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Siemens Simcenter Femap. 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 BDF files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

ADDITIONAL DETAILS Siemens has issued an update to correct this vulnerability. More details can be found at:
https://www.cisa.gov/uscert/ics/advisories/icsa-22-069-10
DISCLOSURE TIMELINE
  • 2021-09-29 - Vulnerability reported to vendor
  • 2022-03-16 - Coordinated public release of advisory
CREDIT xina1i
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