Advisory Details

July 7th, 2021

Siemens Simcenter Femap modfem File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability

ZDI-21-780
ZDI-CAN-12819

CVE ID CVE-2021-27387
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 modfem files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated data structure. An attacker can leverage this vulnerability to execute code in the context of the current process.

ADDITIONAL DETAILS

https://us-cert.cisa.gov/ics/advisories/icsa-21-159-12
https://cert-portal.siemens.com/productcert/pdf/ssa-133038.pdf


DISCLOSURE TIMELINE
  • 2021-03-05 - Vulnerability reported to vendor
  • 2021-07-07 - Coordinated public release of advisory
CREDIT Francis Provencher {PRL}
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