CVE-2020-35684

 

Published at: - 19-08-2021 02:15

Last modified: - 26-09-2022 12:39

Total changes: - 5

Description

An issue was discovered in HCC Nichestack 3.0. The code that parses TCP packets relies on an unchecked value of the IP payload size (extracted from the IP header) to compute the length of the TCP payload within the TCP checksum computation function. When the IP payload size is set to be smaller than the size of the IP header, the TCP checksum computation function may read out of bounds (a low-impact write-out-of-bounds is also possible).

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

 

Verification logic

 

Reference

• https://cert-portal.siemens.com/productcert/pdf/ssa-789208.pdf
• https://www.hcc-embedded.com
• VU#608209-Third Party Advisory, US Government Resource
• https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/

 

Keywords

NVD

 

CVE-2020-35684

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures