Vulnerability Details CVE-2021-31401
An issue was discovered in tcp_rcv() in nptcp.c in HCC embedded InterNiche 4.0.1. The TCP header processing code doesn't sanitize the value of the IP total length field (header length + data length). With a crafted IP packet, an integer overflow occurs whenever the value of the IP data length is calculated by subtracting the length of the header from the total length of the IP packet.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.007
EPSS Ranking 71.4%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 5.0
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-789208.pdf
- https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/
- https://www.kb.cert.org/vuls/id/608209
- https://cert-portal.siemens.com/productcert/pdf/ssa-789208.pdf
- https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/
- https://www.kb.cert.org/vuls/id/608209
Products affected by CVE-2021-31401
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cpe:2.3:a:hcc-embedded:nichestack:3.0
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cpe:2.3:h:siemens:sentron_3wa_com190:-
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cpe:2.3:h:siemens:sentron_3wl_com35:-
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cpe:2.3:o:siemens:sentron_3wa_com190_firmware:*
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cpe:2.3:o:siemens:sentron_3wl_com35_firmware:*