Vulnerability · Published Aug 19, 2021 · Assigned by mitre
CVE-2020-35683
High 7.5
In plain English
A high-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.3% (higher than 83% of all known vulnerabilities).
Severity (CVSS NVD)7.5High
Exploit odds (30 days)2.3%top 16.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
References
- https://www.hcc-embedded.com x_refsource_MISC
- https://cert-portal.siemens.com/productcert/pdf/ssa-789208.pdf x_refsource_CONFIRM
- https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/ x_refsource_MISC
- VU#608209 third-party-advisory, x_refsource_CERT-VN