{"schemaVersion":3,"id":"CVE-2023-29383","aliases":["SUSE-SU-2023:2066-1","SUSE-SU-2023:2067-1","SUSE-SU-2023:2068-1","SUSE-SU-2023:2069-1","SUSE-SU-2023:2070-1","SUSE-SU-2024:0939-1","UBUNTU-CVE-2023-29383","DEBIAN-CVE-2023-29383","openSUSE-SU-2024:12881-1"],"status":"published","duplicateOf":null,"title":null,"description":"In Shadow 4.13, it is possible to inject control characters into fields provided to the SUID program chfn (change finger). Although it is not possible to exploit this directly (e.g., adding a new user fails because \\n is in the block list), it is possible to misrepresent the /etc/passwd file when viewed. Use of \\r manipulations and Unicode characters to work around blocking of the : character make it possible to give the impression that a new user has been added. In other words, an adversary may be able to convince a system administrator to take the system offline (an indirect, social-engineered denial of service) by demonstrating that \"cat /etc/passwd\" shows a rogue user account.","dates":{"published":"2023-04-14T00:00:00.000Z","modified":"2026-10-14T22:55:00.155Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":3.3,"severity":"low","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":3.3,"severity":"low","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","exploitability":4.6,"impact":2.3,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · 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