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Description

A container privilege escalation flaw was found in KServe ModelMesh container 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.

PUBLISHED Reserved 2025-08-21 | Published 2025-09-30 | Updated 2025-10-01 | Assigner redhat




MEDIUM: 5.2CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:H/A:L

Problem types

Incorrect Default Permissions

Product status

Default status
affected

sha256:53ac36baa374159b9065c718a9ede821bbb61d9ebe9502b2243e0a9f7aca0d16 before *
unaffected

Default status
affected

sha256:687c8eeed55f021ecaab1307f0e88b5b16d91f72d63b3d7168d7bbee90e8947b before *
unaffected

Default status
affected

Timeline

2025-08-26:Reported to Red Hat.
2025-09-30:Made public.

Credits

Red Hat would like to thank Antony Di Scala and Michael Whale for reporting this issue.

References

access.redhat.com/errata/RHBA-2025:16983 (RHBA-2025:16983) vendor-advisory

access.redhat.com/errata/RHBA-2025:16984 (RHBA-2025:16984) vendor-advisory

access.redhat.com/security/cve/CVE-2025-57852 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2391105 (RHBZ#2391105) issue-tracking

cve.org (CVE-2025-57852)

nvd.nist.gov (CVE-2025-57852)

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