Out-of-bounds Read in Hcc-Embedded Nichestack
CVE-2020-35683
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.023 (82.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 82.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.hcc-embedded.com (Product)
- cert-portal.siemens.com/productcert/pdf/ssa-789208.pdf (Third Party Advisory, Mitigation)
- www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-foun… (Third Party Advisory, Mitigation)
- www.kb.cert.org/vuls/id/608209 (US Government Resource, Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2020-35683?
- CVE-2020-35683 is a high-severity vulnerability in Hcc-Embedded Nichestack, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2021-08-19.
- How severe is CVE-2020-35683?
- High severity. CVSS v3 base score is 7.5 out of 10.