CVE-2020-35683

HIGH

Hcc-embedded Nichestack < 3.0.4 - Out-of-Bounds Read

Title source: rule
STIX 2.1

Description

An issue was discovered in HCC Nichestack 3.0. The code that parses ICMP packets relies on an unchecked value of the IP payload size (extracted from the IP header) to compute the ICMP checksum. When the IP payload size is set to be smaller than the size of the IP header, the ICMP checksum computation function may read out of bounds, causing a Denial-of-Service.

References (4)

Core 4
Core References
Product x_refsource_misc
https://www.hcc-embedded.com
Mitigation, Third Party Advisory x_refsource_confirm
https://cert-portal.siemens.com/productcert/pdf/ssa-789208.pdf
Third Party Advisory, US Government Resource third-party-advisory x_refsource_cert-vn
https://www.kb.cert.org/vuls/id/608209

Scores

CVSS v3 7.5
EPSS 0.0053
EPSS Percentile 67.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-125
Status published
Products (2)
hcc-embedded/nichestack 3.0
siemens/7km9300-0ae02-0aa0_firmware < 3.0.4
Published Aug 19, 2021
Tracked Since Feb 18, 2026