Incorrect Authorization Affecting zincati package, versions >=0.0.24 <0.0.30
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published2 Apr 2025
- disclosed16 Mar 2025
- creditJonathan Lebon
Introduced: 16 Mar 2025
CVE-2025-27512 (opens in a new tab)How to fix?
Upgrade zincati to version 0.0.30 or higher.
Overview
zincati is an auto-update agent for Fedora CoreOS hosts
Affected versions of this package are vulnerable to Incorrect Authorization in a polkit rule, which grants org.projectatomic.rpmostree1.deploy and org.projectatomic.rpmostree1.finalize-deployment to all users and not only the system user as intended. A user with access to the system D-Bus socket may use this to perform a download attack on the target OS.
Workaround
This incorrect privilege assignment can be preempted by adding an earlier rule containing
polkit.addRule(function(action, subject) {
if (action.id == "org.projectatomic.rpmostree1.deploy" ||
action.id == "org.projectatomic.rpmostree1.finalize-deployment" ||
action.id == "org.projectatomic.rpmostree1.cleanup") {
if (subject.user != "zincati") {
return polkit.Result.NO;
}
}
});