Description
In OpenStack Octavia before 18.0.1, the Amphora provider driver did not validate the listener and pool tls_ciphers field for control characters. The value is written verbatim into the HAProxy configuration generated on the amphora, and thus an authenticated project member who owns a TLS-enabled load balancer can embed a newline and inject arbitrary HAProxy configuration directives. Only deployments using the Amphora provider are affected.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenStack | Octavia | 6.0.0 – < 16.1.0, 17.0.0 – < 17.0.1, 18.0.0 – < 18.0.1 | 16.1.0 |
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 | octavia | 18.0.0-4 | — |
| Debian 13 | octavia | No fix yet | — |
| Debian 12 | octavia | 11.0.0-2+deb12u1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | octavia | 1:18.0.0-0ubuntu2.1 | USN-8814-1 |
| Ubuntu 24.04 LTS | octavia | 1:14.0.0-0ubuntu1.6 | USN-8814-1 |
| Ubuntu 22.04 LTS | octavia | 1:10.1.1-0ubuntu1.5 | USN-8814-1 |
| Ubuntu 20.04 LTS | octavia | No fix yet | — |
Advisories 1
- USN-8814-1 octavia vulnerabilities Ubuntu Security Notices (USN) · Sep 25, 2026
References
- https://bugs.launchpad.net/octavia/+bug/2162101 issue-tracking
- https://bugs.launchpad.net/octavia/+bug/2167565 issue-tracking
- https://bugs.debian.org/1148175 issue-tracking
- https://opendev.org/openstack/octavia/commit/cad62902e4984a46ad80cbfa943e90006d8d599d patch
- https://security.openstack.org/ossa/OSSA-2026-039.html vendor-advisory
- https://openwall.com/lists/oss-security/2026/09/21/6 mailing-list