CVE-2024-56433

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.

CVSS v3.1 Score

3.6

LOW

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

Weakness Type (CWE)

CWE-1188 CWE-1188

References

Other References

https://github.com/shadow-maint/shadow/blob/e2512d5741d4a44bdd81a8c2d0029b6222728cf0/etc/login.defs#L238-L241 https://github.com/shadow-maint/shadow/issues/1157 https://github.com/shadow-maint/shadow/releases/tag/4.4

Frequently Asked Questions

What is CVE-2024-56433? +

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. It has a CVSS v3.1 base score of 3.6 (LOW).

How severe is CVE-2024-56433? +

CVE-2024-56433 has a CVSS v3.1 score of 3.6 out of 10, rated LOW. This is a low-severity vulnerability with limited impact.

How do I check if I'm vulnerable to CVE-2024-56433? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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