Advisory Details

February 24th, 2021

Siemens JT2Go PAR File Parsing Out-Of-Bounds Read Remote Code Execution Vulnerability

ZDI-21-238
ZDI-CAN-12040

CVE ID CVE-2020-26998
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 JT2Go
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Siemens JT2Go. 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 PAR files. The issue results from the lack of proper validation of user-supplied data, which can result in a read 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://cert-portal.siemens.com/productcert/pdf/ssa-695540.pdf
https://us-cert.cisa.gov/ics/advisories/icsa-21-147-04


DISCLOSURE TIMELINE
  • 2020-11-11 - Vulnerability reported to vendor
  • 2021-02-24 - Coordinated public release of advisory
  • 2021-06-08 - Advisory Updated
CREDIT rgod
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