Description
shadow-utils (aka shadow) 4.4 through 4.17.0 establishes a default /etc/subuid behavior (e.g., uid 100000 through 165535 for the first user account) that can realistically conflict with the uids of users defined on locally administered networks, potentially leading to account takeover, e.g., by leveraging newuidmap for access to an NFS home directory (or same-host resources in the case of remote logins by these local network users). NOTE: it may also be argued that system administrators should not have assigned uids, within local networks, that are within the range that can occur in /etc/subuid.
Mitigation
Minimal update. May introduce new vulnerabilities or breaking changes.
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 debian 12 | | =1:4.13+dfsg1-1 || =1:4.13+dfsg1-1+deb12u1 || =1:4.13+dfsg1-1+deb12u2 || =1:4.13+dfsg1-2 || =1:4.13+dfsg1-3 || =1:4.13+dfsg1-4 || =1:4.13+dfsg1-5 || =1:4.15.1-1 || =1:4.15.2-1 || =1:4.15.2-2 || =1:4.15.2-3 || =1:4.15.3-1 || =1:4.15.3-2 || =1:4.15.3-3 || =1:4.16.0-1 || =1:4.16.0-2 || =1:4.16.0-3 || =1:4.16.0-4 || =1:4.16.0-5 || =1:4.16.0-6 || =1:4.16.0-7 || =1:4.17.0-1 || =1:4.17.0~rc1-1 || =1:4.17.0~rc1-2 || =1:4.17.1-1 || =1:4.17.1-2 || =1:4.17.2-1 || =1:4.17.2-2 || =1:4.17.2-3 || =1:4.17.2-4 || =1:4.17.2-5 || =1:4.17.2-5+hurd.1 || =1:4.17.2-6 || =1:4.17.3-1 || =1:4.17.3-2 || =1:4.17.3-3 || =1:4.17.4-1 || =1:4.17.4-2 || =1:4.18.0-1 || =1:4.18.0-2 || =1:4.19.0-1 || =1:4.19.0-2 || =1:4.19.0-3 || =1:4.19.0-4 || =1:4.19.2-1 || =1:4.19.3-1 || =1:4.19.3-2 | - |
debian 11 | | =1:4.11.1+dfsg1-0exp1 || =1:4.11.1+dfsg1-1 || =1:4.11.1+dfsg1-2 || =1:4.12.3+dfsg1-1 || =1:4.12.3+dfsg1-2 || =1:4.12.3+dfsg1-3 || =1:4.13+dfsg1-1 || =1:4.13+dfsg1-2 || =1:4.13+dfsg1-3 || =1:4.13+dfsg1-4 || =1:4.13+dfsg1-5 || =1:4.15.1-1 || =1:4.15.2-1 || =1:4.15.2-2 || =1:4.15.2-3 || =1:4.15.3-1 || =1:4.15.3-2 || =1:4.15.3-3 || =1:4.16.0-1 || =1:4.16.0-2 || =1:4.16.0-3 || =1:4.16.0-4 || =1:4.16.0-5 || =1:4.16.0-6 || =1:4.16.0-7 || =1:4.17.0-1 || =1:4.17.0~rc1-1 || =1:4.17.0~rc1-2 || =1:4.17.1-1 || =1:4.17.1-2 || =1:4.17.2-1 || =1:4.17.2-2 || =1:4.17.2-3 || =1:4.17.2-4 || =1:4.17.2-5 || =1:4.17.2-5+hurd.1 || =1:4.17.2-6 || =1:4.17.3-1 || =1:4.17.3-2 || =1:4.17.3-3 || =1:4.17.4-1 || =1:4.17.4-2 || =1:4.18.0-1 || =1:4.18.0-2 || =1:4.19.0-1 || =1:4.19.0-2 || =1:4.19.0-3 || =1:4.19.0-4 || =1:4.19.2-1 || =1:4.19.3-1 || =1:4.19.3-2 || =1:4.8.1-1 || =1:4.8.1-1+deb11u1 || =1:4.8.1-1.1 || =1:4.8.1-2 | - |
debian 13 | | =1:4.17.4-2 || =1:4.18.0-1 || =1:4.18.0-2 || =1:4.19.0-1 || =1:4.19.0-2 || =1:4.19.0-3 || =1:4.19.0-4 || =1:4.19.2-1 || =1:4.19.3-1 || =1:4.19.3-2 | - |
debian 14 | | =1:4.17.4-2 || =1:4.18.0-1 || =1:4.18.0-2 || =1:4.19.0-1 || =1:4.19.0-2 || =1:4.19.0-3 || =1:4.19.0-4 || =1:4.19.2-1 || =1:4.19.3-1 || =1:4.19.3-2 | - |
 rpm rhel7 | | - | - |
rpm rhel6 | | - | - |
rpm rhel10 | | | 2:4.15.0-8.el10 |
rpm rhel9 | | | 2:4.9-15.el9 |
rpm rhel8 | | - | - |
