CVE-2017-6297

MEDIUM

MikroTik RouterOS 6.83.3 and 6.37.4 - Missing Encryption of Sensitive Data in L2TP Client

Title source: llm

Description

The L2TP Client in MikroTik RouterOS versions 6.83.3 and 6.37.4 does not enable IPsec encryption after a reboot, which allows man-in-the-middle attackers to view transmitted data unencrypted and gain access to networks on the L2TP server by monitoring the packets for the transmitted data and obtaining the L2TP secret.

References (2)

Core 2

Core References

Exploit, Third Party Advisory x_refsource_misc

https://blog.milne.it/2017/02/24/mikrotik-routeros-security-vulnerability-l2tp-tunnel-unencrypted-cve-2017-6297/

Third Party Advisory, VDB Entry vdb-entry x_refsource_bid

http://www.securityfocus.com/bid/96447

Scores

CVSS v3 5.9

EPSS 0.0074

EPSS Percentile 49.8%

Attack Vector NETWORK

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Details

CWE

CWE-311

Status published

Products (2)

mikrotik/routeros 6.37.4

mikrotik/routeros 6.83.3

Published Feb 27, 2017

Tracked Since Feb 18, 2026