Description
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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | tinc | 1.0.35-1 | — |
| Debian 13 | tinc | 1.0.35-1 | — |
| Debian 12 | tinc | 1.0.35-1 | — |
| Debian 9 | tinc | 1.0.31-1+deb9u1 | DSA-4312-1 |
| Debian 8 | tinc | 1.0.24-2+deb8u1 | DLA-1538-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | tinc | No fix yet | — |
| Ubuntu 16.04 LTS | tinc | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | tinc | 1.0.36-1.9 | openSUSE-SU-2024:11463-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | tinc | 1.0.35-r0 | — |
| Alpine v3.23 | tinc | 1.0.35-r0 | — |
| Alpine v3.22 | tinc | 1.0.35-r0 | — |
| Alpine v3.21 | tinc | 1.0.35-r0 | — |
| Alpine v3.20 | tinc | 1.0.35-r0 | — |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | tinc | 1.0.35-r0 | — |
| Alpine v3.18 | tinc | 1.0.35-r0 | — |
| Alpine v3.17 | tinc | 1.0.35-r0 | — |
| Alpine v3.16 | tinc | 1.0.35-r0 | — |
| Alpine v3.15 | tinc | 1.0.35-r0 | — |
| Alpine v3.14 | tinc | 1.0.35-r0 | — |
| Alpine v3.13 | tinc | 1.0.35-r0 | — |
| Alpine v3.12 | tinc | 1.0.35-r0 | — |
| Alpine v3.11 | tinc | 1.0.35-r0 | — |
| Alpine v3.10 | tinc | 1.0.35-r0 | — |
| Alpine v3.9 | tinc | 1.0.35-r0 | — |
| Alpine v3.8 | tinc | 1.0.35-r0 | — |
| Alpine v3.7 | tinc | 1.0.35-r0 | — |
| Alpine v3.6 | tinc | 1.0.35-r0 | — |
Advisories 3
- DSA-4312-1 tinc - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1538-1 tinc - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:11463-1 tinc-1.0.36-1.9 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026