Vulnerability in Mikrotik Routeros

CVE-2019-3979

RouterOS versions 6.45.6 Stable, 6.44.5 Long-term, and below are vulnerable to a DNS unrelated data attack. The router adds all A records to its DNS cache even when the records are unrelated to the domain that was queried. Therefore, a remote attacker controlled DNS server can poison the router's DNS cache via malicious responses with additional and untrue records.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.009 (58.6th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2019-3979: held from 0.009 to 0.009.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

  • Mikrotik Routeros
  • Mikrotik Routeros — versions RouterOS 6.45.6 Stable and below. RouterOS 6.44.5 Long-term and below.

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2019-3979?
CVE-2019-3979 is a high-severity vulnerability in Mikrotik Routeros, classified under Insufficient Verification of Data Authenticity. CVSS score: 7.5/10. Published 2019-10-29.
How severe is CVE-2019-3979?
High severity. CVSS v3 base score is 7.5 out of 10.