CVE-2020-26996: 
Siemens JT2Go vulnerability analysis and mitigation

A vulnerability (CVE-2020-26996) was identified in JT2Go (all versions < V13.1.0) and Teamcenter Visualization (all versions < V13.1.0). The vulnerability stems from improper validation of user-supplied data when parsing CG4 files, which could result in a memory access past the end of an allocated buffer (NVD, ZDI).

The vulnerability is classified as an Out-of-bounds Read (CWE-125) with a CVSS v3.1 Base Score of 8.8 HIGH (Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). The specific flaw exists within the parsing of CG4 files, where the application fails to properly validate user-supplied data, leading to a read operation beyond the bounds of an allocated memory buffer (NVD, ZDI).

An attacker could leverage this vulnerability to execute arbitrary code in the context of the current process. The vulnerability requires user interaction, as the target must visit a malicious page or open a malicious file to trigger the exploit (ZDI).

The vulnerability requires user interaction to be exploited, where the target must open a malicious file or visit a malicious page. The attack complexity is considered low, requiring no privileges but does need user interaction (NVD).

Siemens has released updates to address this vulnerability. Users are advised to update to JT2Go version 13.1.0 or later. For Teamcenter Visualization, users should upgrade to version 13.1.0 or later (CISA).