#VU54017 Out-of-bounds write in Solid Edge SE2020 and Solid Edge SE2021 - CVE-2021-31342

Vulnerability identifier: #VU54017

Vulnerability risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-31342

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Solid Edge SE2020
Server applications / SCADA systems
Solid Edge SE2021
Server applications / SCADA systems

Vendor: Siemens

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in the ugeom2d.dll library. A remote attacker can create a specially crafted DFT file, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Solid Edge SE2020: before 2020MP14

Solid Edge SE2021: before SE2021MP5

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External links
https://cert-portal.siemens.com/productcert/pdf/ssa-208356.pdf
https://us-cert.cisa.gov/ics/advisories/icsa-21-159-09

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.