{"id":"CVE-2025-27512","summary":"Zincati allows unprivileged access to rpm-ostree D-Bus `Deploy()` and `FinalizeDeployment()` methods","details":"Zincati is an auto-update agent for Fedora CoreOS hosts. Zincati ships a polkit rule which allows the `zincati` system user to use the actions `org.projectatomic.rpmostree1.deploy` to deploy updates to the system and `org.projectatomic.rpmostree1.finalize-deployment` to reboot the system into the deployed update. Since Zincati v0.0.24, this polkit rule contains a logic error which broadens access of those polkit actions to any unprivileged user rather than just the `zincati` system user. In practice, this means that any unprivileged user with access to the system D-Bus socket is able to deploy older Fedora CoreOS versions (which may have other known vulnerabilities). Note that rpm-ostree enforces that the selected version must be from the same branch the system is currently on so this cannot directly be used to deploy an attacker-controlled update payload. This primarily impacts users running untrusted workloads with access to the system D-Bus socket. Note that in general, untrusted workloads should not be given this access, whether containerized or not. By default, containers do not have access to the system D-Bus socket. The logic error is fixed in Zincati v0.0.30. A workaround is to manually add a following polkit rule, instructions for which are available in the GitHub Security Advisory.","aliases":["GHSA-w6fv-6gcc-x825"],"modified":"2026-04-15T04:49:01.284434Z","published":"2025-03-17T14:46:28.219Z","database_specific":{"cwe_ids":["CWE-783","CWE-863"],"cna_assigner":"GitHub_M","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/27xxx/CVE-2025-27512.json"},"references":[{"type":"WEB","url":"https://github.com/coreos/zincati/releases/tag/v0.0.24"},{"type":"WEB","url":"https://github.com/coreos/zincati/releases/tag/v0.0.30"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/27xxx/CVE-2025-27512.json"},{"type":"ADVISORY","url":"https://github.com/coreos/zincati/security/advisories/GHSA-w6fv-6gcc-x825"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-27512"},{"type":"FIX","url":"https://github.com/coreos/zincati/commit/01d8e89f799e6ba21bdf7dc668abce23bd0d8f78"},{"type":"FIX","url":"https://github.com/coreos/zincati/commit/28a43aa2c1edda091ba659677d73c13e6e3ea99d"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/coreos/zincati","events":[{"introduced":"0"},{"fixed":"01d8e89f799e6ba21bdf7dc668abce23bd0d8f78"}]},{"type":"GIT","repo":"https://github.com/coreos/zincati","events":[{"introduced":"0"},{"fixed":"28a43aa2c1edda091ba659677d73c13e6e3ea99d"}]},{"type":"GIT","repo":"https://github.com/coreos/zincati","events":[{"introduced":"0"},{"fixed":"7f805e064575e936034e2d3ef56589e537d30c06"}]},{"type":"GIT","repo":"https://github.com/coreos/zincati","events":[{"introduced":"0"},{"fixed":"688021f140753bddde483a9e66203fa465a3623e"}]}],"versions":["v0.0.26","v0.0.27"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-27512.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U"}]}