Advisory Details

July 7th, 2021

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

CVE ID	CVE-2021-27399
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 before the start 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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