PT-2019-3891 · Mikrotik · Routeros+1

Published 2019-10-28 · Updated 2021-12-09 · CVE-2019-3978

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:C/A:N

Name of the Vulnerable Software and Affected Versions RouterOS versions 6.45.6 and below RouterOS versions 6.44.5 and below

Description The issue is related to the lack of authentication for a critical function in the RouterOS operating system. This allows a remote attacker to exploit the vulnerability by sending DNS queries through port 8291, potentially affecting the integrity of protected information. The queries are sent from the router to a server of the attacker's choice, and the DNS responses are cached by the router, which could result in cache poisoning.

Recommendations For RouterOS versions 6.45.6 and below, update to a version that includes a fix for this issue. For RouterOS versions 6.44.5 and below, update to a version that includes a fix for this issue. As a temporary workaround, consider restricting access to port 8291 to minimize the risk of exploitation.

Exploit

Fix

Missing Authentication

Weakness Enumeration

CWE-306

Related Identifiers

BDU:2019-04284

CVE-2019-3978

Affected Products

Mikrotik Routeros

Routeros

References · 10

• 🔥 https://exploit-db.com/exploits/47566 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2019-3978 · Security Note
• https://bdu.fstec.ru/vul/2019-04284 · Security Note
• https://osv.dev/vulnerability/CVE-2019-3978 · Vendor Advisory
• https://blog.mikrotik.com/security/dns-cache-poisoning-vulnerability.html · Note
• http://packetstormsecurity.com/files/155036/MikroTik-RouterOS-6.45.6-DNS-Cache-Poisoning.html · Note
• https://packetstormsecurity.com/files/155036/MikroTik-RouterOS-6.45.6-DNS-Cache-Poisoning.html · Note
• https://t.me/true_secator/2427 · Telegram Post
• https://tenable.com/security/research/tra-2019-46 · Note
• https://t.me/cybershit/608 · Telegram Post