CVE-2024-56433 The advisory has been revoked - it doesn't affect any version of package shadow (opens in a new tab)
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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Test your applications- Snyk IDSNYK-UBUNTU2504-SHADOW-9791968
- published23 Apr 2025
- disclosed26 Dec 2024
Introduced: 26 Dec 2024
CVE-2024-56433 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:25.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream shadow package and not the shadow package as distributed by Ubuntu.
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.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2024-56433
- 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
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html