Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Butok | Fnet | <= 4.6.4 |
Related Weaknesses (CWE)
References
- http://fnet.sourceforge.net/manual/fnet_history.htmlRelease NotesThird Party Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01Third Party AdvisoryUS Government Resource
- https://www.kb.cert.org/vuls/id/815128Third Party AdvisoryUS Government Resource
- http://fnet.sourceforge.net/manual/fnet_history.htmlRelease NotesThird Party Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01Third Party AdvisoryUS Government Resource
- https://www.kb.cert.org/vuls/id/815128Third Party AdvisoryUS Government Resource
FAQ
What is CVE-2020-17470?
CVE-2020-17470 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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...
How severe is CVE-2020-17470?
CVE-2020-17470 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-17470?
Check the references section above for vendor advisories and patch information. Affected products include: Butok Fnet.