Description
An issue was discovered in Barrier before 2.4.0. The barriers component (aka the server-side implementation of Barrier) does not sufficiently verify the identify of connecting clients. Clients can thus exploit weaknesses in the provided protocol to cause denial-of-service or stage further attacks that could lead to information leaks or integrity corruption.
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.
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP3 | barrier | 2.4.0-bp153.2.3.1 | openSUSE-SU-2021:1595-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | barrier | 2.4.0-1.1 | openSUSE-SU-2024:11633-1 |
| openSUSE Leap 15.3 | barrier | 2.4.0-bp153.2.3.1 | openSUSE-SU-2021:1595-1 |
| openSUSE Leap 15.2 | barrier | 2.4.0-lp152.3.6.1 | openSUSE-SU-2021:1498-1 |
Advisories 3
- openSUSE-SU-2021:1595-1 Security update for barrier SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11633-1 barrier-2.4.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1498-1 Security update for barrier SUSE / openSUSE Security Updates · Feb 4, 2026
References
- [oss-security] 20211102 Barrier "software KVM switch" multiple remote security issues mailing-list
- https://github.com/debauchee/barrier/releases/tag/v2.4.0
- FEDORA-2022-3dc519f073 vendor-advisory
- FEDORA-2022-09c1a5bab8 vendor-advisory