(Pwn2Own) Softing Secure Integration Server UnZipFolder Directory Traversal Remote Code Execution Vulnerability

August 23rd, 2022
ZDI-22-1156 ZDI-CAN-17255

CVE ID

CVE-2022-1373

CVSS Score

7.2 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected Vendors

Softing

Affected Products

Secure Integration Server

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Softing Secure Integration Server. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed.

The specific flaw exists within the Zip::UnZipFolder method. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to execute code in the context of SYSTEM.

Additional Details

Softing has issued an update to correct this vulnerability. More details can be found at:
https://industrial.softing.com/fileadmin/psirt/downloads/syt-2022-5.html

Disclosure Timeline

  • 2022-05-09 - Vulnerability reported to vendor
  • 2022-08-23 - Coordinated public release of advisory

Credit

Chris Anastasio (muffin) and Steven Seeley (mr_me) of Incite Team

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