Vulnerability · Published Aug 19, 2021 · Assigned by mitre
CVE-2021-31400
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 1.5% (higher than 74% of all known vulnerabilities).
Severity (CVSS NVD)7.5High
Exploit odds (30 days)1.5%top 25.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
An issue was discovered in tcp_pulloutofband() in tcp_in.c in HCC embedded InterNiche 4.0.1. The TCP out-of-band urgent-data processing function invokes a panic function if the pointer to the end of the out-of-band data points outside of the TCP segment's data. If the panic function hadn't a trap invocation removed, it will enter an infinite loop and therefore cause DoS (continuous loop or a device reset).
Affected products (as reported)
References
- 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