CVE-2018-16758
Missing message authentication in the meta-protocol in Tinc VPN version 1.0.34 and earlier allows...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2018-16758- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:P/I:N/A:N - Weakness
- CWE-306
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2018-16758- Updated
- 2026-11-02
EUVDEUVD-2018-8558 No score
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.
- Record
EUVD-2018-8558- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-52p3-pmr5-f54r
Missing message authentication in the meta-protocol in Tinc VPN version 1.0.34 and earlier allows...
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.
- Record
GHSA-52p3-pmr5-f54r- CVSS 3.0
- 5.9 Medium
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-306
- Updated
- 2026-11-02
OSVALPINE-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.
- Record
ALPINE-CVE-2018-16758- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSV
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.
- Record
CVE-2018-16758- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVDEBIAN-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.
- Record
DEBIAN-CVE-2018-16758- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVUBUNTU-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.
- Record
UBUNTU-CVE-2018-16758- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVopenSUSE-SU-2024:11463-1 No score
tinc-1.0.36-1.9 on GA media
These are all security issues fixed in the tinc-1.0.36-1.9 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:11463-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
tincAlpine:v3.10 |
before 1.0.35-r0 | 1.0.35-r0 |
tincAlpine:v3.11 |
before 1.0.35-r0 | 1.0.35-r0 |
tincAlpine:v3.12 |
before 1.0.35-r0 | 1.0.35-r0 |
tincAlpine:v3.13 |
before 1.0.35-r0 | 1.0.35-r0 |
tincAlpine:v3.14 |
before 1.0.35-r0 | 1.0.35-r0 |
tincAlpine:v3.15 |
before 1.0.35-r0 | 1.0.35-r0 |
tincAlpine:v3.16 |
before 1.0.35-r0 | 1.0.35-r0 |
tincAlpine:v3.17 |
before 1.0.35-r0 | 1.0.35-r0 |
tincAlpine:v3.18 |
before 1.0.35-r0 | 1.0.35-r0 |
tincAlpine:v3.19 |
before 1.0.35-r0 | 1.0.35-r0 |
Show 17 moreShow less
| Package | Affected | Fixed |
|---|---|---|
tincAlpine:v3.20 |
before 1.0.35-r0 | 1.0.35-r0 |
tincAlpine:v3.21 |
before 1.0.35-r0 | 1.0.35-r0 |
tincAlpine:v3.22 |
before 1.0.35-r0 | 1.0.35-r0 |
tincAlpine:v3.23 |
before 1.0.35-r0 | 1.0.35-r0 |
tincAlpine:v3.24 |
before 1.0.35-r0 | 1.0.35-r0 |
tincAlpine:v3.6 |
before 1.0.35-r0 | 1.0.35-r0 |
tincAlpine:v3.7 |
before 1.0.35-r0 | 1.0.35-r0 |
tincAlpine:v3.8 |
before 1.0.35-r0 | 1.0.35-r0 |
tincAlpine:v3.9 |
before 1.0.35-r0 | 1.0.35-r0 |
tincDebian:12 |
before 1.0.35-1 | 1.0.35-1 |
tincDebian:13 |
before 1.0.35-1 | 1.0.35-1 |
tincDebian:14 |
before 1.0.35-1 | 1.0.35-1 |
tincDebian:8 |
before 1.0.24-2+deb8u1 | 1.0.24-2+deb8u1 |
tincDebian:9 |
before 1.0.31-1+deb9u1, plus listed versions 1.0.31-1 |
1.0.31-1+deb9u1 |
tincUbuntu:16.04:LTS |
All versions, plus listed versions 1.0.26-1 |
None known |
tincUbuntu:18.04:LTS |
All versions, plus listed versions 1.0.31-11.0.32-11.0.33-11.0.33-1build1 |
None known |
tincopenSUSE:Tumbleweed |
before 1.0.36-1.9 | 1.0.36-1.9 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-16758 is a medium vulnerability (CVSS 5.9) in Tinc-vpn Tinc, published October 8, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.95%, the 61st percentile. Fixed in tinc 1.0.35-r0.
References
tinc-vpn.org/security
tinc-vpn.org/git/browse?p=tinc%3Ba=commit%3Bh=e97943b7cc9c851ae36f5a41e2b6102faa74193f
debian.org/security/2018/dsa-4312
starwindsoftware.com/security/sw-20190227-0003
nvd.nist.gov/vuln/detail/CVE-2018-16758