High severity7.5NVD Advisory· Published Aug 19, 2021· Updated Jun 17, 2026
CVE-2021-31400
CVE-2021-31400
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).
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Affected products
2- HCC embedded/InterNichedescription
- Range: 4.0.1
Patches
Vulnerability mechanics
References
2- www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/nvdMitigationThird Party Advisory
- www.kb.cert.org/vuls/id/608209nvdThird Party AdvisoryUS Government Resource
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