CVE-2025-57851: medium-severity vulnerability in Red Hat Multicluster Engine for Kubernetes
Mce: privilege escalation via excessive /etc/passwd permissions
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.4epss 0.1%
A container privilege escalation flaw was found in certain Multicluster Engine for Kubernetes images. This issue stems from the /etc/passwd file being created with group-writable permissions during build time. In certain conditions, an attacker who can execute commands within an affected container, even as a non-root user, can leverage their membership in the root group to modify the /etc/passwd file. This could allow the attacker to add a new user with any arbitrary UID, including UID 0, leading to full root privileges within the container.
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Affected products
Red Hat · Multicluster Engine for KubernetesRelated CVEs — Red Hat Multicluster Engine for Kubernetes
In the same product, most dangerous first.
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