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3 vulnerabilities found for authd by Canonical
CVE-2026-102631 (GCVE-0-2026-102631)
Vulnerability from cvelistv5
Published
2026-10-15 16:42
Modified
2026-10-16 20:16
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-287 - Improper Authentication
Summary
In authd before 0.7.1, the user identity matching in UpdateUser (internal/users/manager.go) resolves an incoming login by the broker-scoped provider ID, but falls back to matching the username when the provider ID does not belong to any known user, and does not reject a conflicting non-empty provider ID. If an identity provider reassigns an email address, which authd uses as the username, to a new account, the new account inherits the previous user's local UID and home directory on its next login. This allows the new user to access and modify files belonging to the previous user, including credentials such as SSH keys and cloud API tokens, and silently rebinds the local account record to the new identity. As a mitigation, administrators should lock or delete the previous user's local authd account when the corresponding IdP account is removed.
References
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Impacted products
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CVE-2026-6970 (GCVE-0-2026-6970)
Vulnerability from cvelistv5
Published
2026-04-27 15:28
Modified
2026-04-27 16:17
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-842 - Placement of user into incorrect group
Summary
authd prior to version 0.6.4 contains a logic error in primary group ID assignment that can lead to local privilege escalation. When a user's primary group ID (GID) differs from their UID, either because the account was created with authd prior to version 0.5.4 or because the primary group was manually changed via the `authctl group set-gid` command, and the user's identity provider record is updated, authd incorrectly resets the user's primary group ID to their UID upon next login. This causes newly created files and directories to be owned by the wrong group, causing denial of service issues, and potentially granting unintended access to other local users and allowing local privilege escalation.
References
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CVE-2025-5689 (GCVE-0-2025-5689)
Vulnerability from cvelistv5
Published
2025-06-16 11:37
Modified
2025-06-17 17:27
Severity ?
VLAI Severity ?
EPSS score ?
Summary
A flaw was found in the temporary user record that authd uses in the pre-auth NSS. As a result, a user login for the first time will be considered to be part of the root group in the context of that SSH session.
References
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