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).
References
Link | Resource |
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https://cert-portal.siemens.com/productcert/pdf/ssa-789208.pdf | Mitigation Third Party Advisory |
https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/ | Mitigation Third Party Advisory |
https://www.hcc-embedded.com | Product |
https://www.kb.cert.org/vuls/id/608209 | Third Party Advisory US Government Resource |
Configurations
Configuration 1 (hide)
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Configuration 2 (hide)
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Configuration 3 (hide)
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History
No history.
Information
Published : 2021-08-19 12:15
Updated : 2024-02-28 18:28
NVD link : CVE-2020-35684
Mitre link : CVE-2020-35684
CVE.ORG link : CVE-2020-35684
JSON object : View
Products Affected
siemens
- sentron_3wl_com35_firmware
- sentron_3wa_com190
- sentron_3wa_com190_firmware
- sentron_3wl_com35
hcc-embedded
- nichestack
CWE
CWE-20
Improper Input Validation