CVE-2020-17468
mediumpriority · track · 31stack campaign · AMNESIA:33EPSS 0.030 · 87 %ileDEEUUSEPSS · scored 2026-10-27
An issue was discovered in FNET through 4.6.4. The code for processing the hop-by-hop header (in the IPv6 extension headers) doesn't check for a valid length of an extension header, and therefore an out-of-bounds read can occur in _fnet_ip6_ext_header_handler_options in fnet_ip6.c, leading to Denial-of-Service.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
A vendor fix is available.
- FixedFNETcisa_csaf_ot
Additional vendors affected by the reported vulnerabilities have also released security advisories related to their affected products. Those advisories are as follows:
https://yanzi.dev/#/security/advisories/2020-12-08 - FixedNut/Netcisa_csaf_ot
Additional vendors affected by the reported vulnerabilities have also released security advisories related to their affected products. Those advisories are as follows:
https://yanzi.dev/#/security/advisories/2020-12-08 - Fixedopen-iscsicisa_csaf_ot
Additional vendors affected by the reported vulnerabilities have also released security advisories related to their affected products. Those advisories are as follows:
https://yanzi.dev/#/security/advisories/2020-12-08 - FixedpicoTCP (EOL)cisa_csaf_ot
Additional vendors affected by the reported vulnerabilities have also released security advisories related to their affected products. Those advisories are as follows:
https://yanzi.dev/#/security/advisories/2020-12-08 - FixedpicoTCP-NGcisa_csaf_ot
Additional vendors affected by the reported vulnerabilities have also released security advisories related to their affected products. Those advisories are as follows:
https://yanzi.dev/#/security/advisories/2020-12-08 - FixeduIP (EOL)cisa_csaf_ot
Additional vendors affected by the reported vulnerabilities have also released security advisories related to their affected products. Those advisories are as follows:
https://yanzi.dev/#/security/advisories/2020-12-08 - FixeduIP-Contiki-NGcisa_csaf_ot
Additional vendors affected by the reported vulnerabilities have also released security advisories related to their affected products. Those advisories are as follows:
https://yanzi.dev/#/security/advisories/2020-12-08 - FixeduIP-Contiki-OS (end-of-life [EOL])cisa_csaf_ot
Additional vendors affected by the reported vulnerabilities have also released security advisories related to their affected products. Those advisories are as follows:
https://yanzi.dev/#/security/advisories/2020-12-08
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (28)
Products and version ranges known to be affected.
- Unify OpenScape Common Management Platformall versionscert_bundDEcpe:/a:unify:openscape_common_management_platform:-
advisories (2)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2022-1044TCP/IP Stack: Mehrere SchwachstellenDeutsch2020-12-08csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in TCP/IP Stack ausnutzen, um beliebigen Programmcode mit Administratorrechten auszuführen, einen Denial of Service Angriff durchzuführen, vertrauliche Daten einzusehen oder Daten zu manipulieren.
- ICSA-20-343-01Multiple Embedded TCP/IP Stacks2020-12-08icsa · cisa_csaf_otUS
Successful exploitation of these vulnerabilities could allow attackers to corrupt memory, put devices into infinite loops, access unauthorized data, and/or poison DNS cache.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (11)
External citations — patches, advisories, analysis.
- http://fnet.sourceforge.net/manual/fnet_history.htmlcnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2020-17468cnnvd
- https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01cnnvd
- https://www.auscert.org.au/bulletins/ESB-2020.4363/cnnvd
- https://www.kb.cert.org/vuls/id/815128cnnvd
- http://fnet.sourceforge.net/manual/fnet_history.htmlenisa_euvd
- https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01enisa_euvd
- https://www.kb.cert.org/vuls/id/815128enisa_euvd
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