Vulnerability Monitor

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CVE-2018-16758

Missing message authentication in the meta-protocol in Tinc VPN version 1.0.34 and earlier allows a man-in-the-middle attack to disable the encryption of VPN packets.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.9, indicating it can be exploited remotely over the network but requires specific conditions to be met without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), for affected systems. Impacting 3 products from tinc-vpn, from debian, from starwindsoftware organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2018, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2018-10-10T21:29:02.103

Last Modified

2024-11-21T03:53:17.657

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.9 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:P/I:N/A:N

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Primary
CWE-306

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	tinc-vpn	tinc	≤ 1.0.34	Yes
Operating System	debian	debian_linux	9.0	Yes
Application	starwindsoftware	starwind_virtual_san	v8	Yes
Application	starwindsoftware	starwind_virtual_san	v8	Yes

References

http://tinc-vpn.org/security/ Vendor Advisory ([email protected])
http://www.tinc-vpn.org/git/browse?p=tinc%3Ba=commit%3Bh=e97943b7cc9c851ae36f5a41e2b6102faa74193f ([email protected])
https://www.debian.org/security/2018/dsa-4312 Third Party Advisory ([email protected])
https://www.starwindsoftware.com/security/sw-20190227-0003/ Third Party Advisory ([email protected])
http://tinc-vpn.org/security/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.tinc-vpn.org/git/browse?p=tinc%3Ba=commit%3Bh=e97943b7cc9c851ae36f5a41e2b6102faa74193f (af854a3a-2127-422b-91ae-364da2661108)
https://www.debian.org/security/2018/dsa-4312 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.starwindsoftware.com/security/sw-20190227-0003/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For tinc-vpn's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.