VULNERABILITY INTELLIGENCE
CVE-2020-17470
CVSS score5.3 MEDIUM
EPSS probability2.10%
CISA KEVNot currently listed
Published2020-12-11
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
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.
Weakness classification
- CWE-330: Use of Insufficiently Random Values
Primary references
- cve@mitre.org — Release Notes, Third Party Advisory
- cve@mitre.org — Third Party Advisory, US Government Resource
- cve@mitre.org — Third Party Advisory, US Government Resource
- af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, US Government Resource
- af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, US Government Resource