Advisory Details

January 14th, 2021

Siemens JT2Go SGI and RGB File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability

ZDI-21-060
ZDI-CAN-11992

CVE ID CVE-2020-26995
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 SGI and RGB files. The issue results from the lack of proper validation of user-supplied data, which can result in a write 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 Siemens has issued an update to correct this vulnerability. More details can be found at:
https://us-cert.cisa.gov/ics/advisories/icsa-21-012-03/
DISCLOSURE TIMELINE
  • 2020-10-28 - Vulnerability reported to vendor
  • 2021-01-14 - Coordinated public release of advisory
CREDIT rgod
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