2021-34327 | Siemens JT2Go//Solid Edge/Teamcenter Visualization ASM File plmxmlAdapterSE70.dll out-of-bounds write (ssa-173615)

By Max On Jul 16, 2021

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6.0	$5k-$25k	0.11

A vulnerability classified as critical was found in Siemens JT2Go, Solid Edge and Teamcenter Visualization up to 13.1. Affected by this vulnerability is an unknown code block in the library plmxmlAdapterSE70.dll of the component ASM File Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-787. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability has been identified in JT2Go (All versions < V13.2), Solid Edge SE2021 (All Versions < SE2021MP5), Teamcenter Visualization (All versions < V13.2). The plmxmlAdapterSE70.dll library in affected applications lacks proper validation of user-supplied data when parsing ASM files. This could result in an out of bounds write past the fixed-length heap-based buffer. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-13423)

The weakness was published 07/13/2021 as ssa-173615. It is possible to read the advisory at cert-portal.siemens.com. This vulnerability is known as CVE-2021-34327 since 06/08/2021. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn’t need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 07/16/2021).

Upgrading to version 13.2 eliminates this vulnerability.

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