Medium severity5.3NVD Advisory· Published Dec 11, 2020· Updated Jun 17, 2026
CVE-2020-17470
CVE-2020-17470
Description
An issue was discovered in FNET through 4.6.4. The code that initializes the DNS client interface structure does not set sufficiently random transaction IDs (they are always set to 1 in _fnet_dns_poll in fnet_dns.c). This significantly simplifies DNS cache poisoning attacks.
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Affected products
2- FNET/FNETdescription
Patches
Vulnerability mechanics
References
3- fnet.sourceforge.net/manual/fnet_history.htmlnvdRelease NotesThird Party Advisory
- us-cert.cisa.gov/ics/advisories/icsa-20-343-01nvdThird Party AdvisoryUS Government Resource
- www.kb.cert.org/vuls/id/815128nvdThird Party AdvisoryUS Government Resource
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