CVE-2019-3979
First published: Mon Oct 28 2019(Updated: )
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.
Credit: vulnreport@tenable.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| MikroTik devices | <=6.44.5 | |
| MikroTik devices | <=6.45.6 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2019-3979?
CVE-2019-3979 is classified as a high severity vulnerability due to the potential for DNS cache poisoning.
How do I fix CVE-2019-3979?
To fix CVE-2019-3979, upgrade your RouterOS to version 6.45.7 or above.
Which versions of RouterOS are affected by CVE-2019-3979?
CVE-2019-3979 affects RouterOS versions 6.45.6 and 6.44.5 and earlier.
What impact does CVE-2019-3979 have on DNS security?
CVE-2019-3979 can lead to DNS cache poisoning, allowing attackers to redirect network traffic.
Is there a workaround for CVE-2019-3979?
There are no known workarounds for CVE-2019-3979; the recommended action is to upgrade to a secure version.
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- version/mikrotik devices/6.45.6