DNS Cache Poisoning Vulnerability in MikroTik RouterOS
CVE-2019-3978

7.5HIGH

Key Information:

Vendor

Mikrotik

Status
Mikrotik Routeros
Vendor
CVE Published:
29 October 2019

What is CVE-2019-3978?

MikroTik RouterOS versions up to and including 6.45.6 and 6.44.5 are susceptible to a vulnerability that allows remote unauthenticated attackers to send DNS queries through port 8291. This vulnerability enables attackers to control the DNS responses sent to the affected routers, which are subsequently cached. The exploited cache can result in misleading DNS information being returned, potentially allowing attackers to redirect users to malicious sites.

Affected Version(s)

MikroTik RouterOS RouterOS 6.45.6 Stable and below. RouterOS 6.44.5 Long-term and below.

References

https://www.tenable.com/security/research/tra-2019-46
x_refsource_MISC
http://packetstormsecurity.com/files/155036/MikroTik-Rout...
x_refsource_MISC

EPSS Score

15% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.