What is CVE-2020-17470?

CVE-2020-17470 is a medium-severity vulnerability in Butok Fnet, classified under Use of Insufficiently Random Values. CVSS score: 5.3/10. Published 2020-12-11.

How severe is CVE-2020-17470?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Butok Fnet

CVE-2020-17470

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.

EPSS: 0.021 (79.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Butok Fnet
N/a — versions n/a

Weakness classification (CWE)

CWE-330 — Use of Insufficiently Random Values

References

cve@mitre.org (US Government Resource, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (US Government Resource, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (x_refsource_CONFIRM, Third Party Advisory, Release Notes)

Frequently asked questions

What is CVE-2020-17470?: CVE-2020-17470 is a medium-severity vulnerability in Butok Fnet, classified under Use of Insufficiently Random Values. CVSS score: 5.3/10. Published 2020-12-11.
How severe is CVE-2020-17470?: Medium severity. CVSS v3 base score is 5.3 out of 10.