Description
Hydra is a Continuous Integration service for Nix based projects. It is possible to trigger evaluations in Hydra without any authentication. Depending on the size of evaluations, this can impact the availability of systems. The problem can be fixed by applying https://github.com/NixOS/hydra/commit/f73043378907c2c7e44f633ad764c8bdd1c947d5 to any Hydra package. Users are advised to upgrade. Users unable to upgrade should deny the `/api/push` route in a reverse proxy. This also breaks the "Evaluate jobset" button in the frontend.
References (4)
Core 4
Core References
Patch, Vendor Advisory x_refsource_confirm
https://github.com/NixOS/hydra/security/advisories/GHSA-xv29-v93r-2f5v
Issue Tracking, Patch x_refsource_misc
https://github.com/NixOS/nixpkgs/pull/337766
Patch x_refsource_misc
https://github.com/NixOS/hydra/commit/f73043378907c2c7e44f633ad764c8bdd1c947d5
Third Party Advisory x_refsource_misc
https://mastodon.delroth.net/@delroth/113029832631860419
Scores
CVSS v3
7.5
EPSS
0.0036
EPSS Percentile
58.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-306
Status
published
Products (1)
nixos/hydra
< 2024-08-27
Published
Aug 27, 2024
Tracked Since
Feb 18, 2026