CVE-2017-12424: Debian Linux

Critical severity, CVSS 9.8. EPSS: 2.7% chance of exploitation in the next 30 days.

In shadow before 4.5, the newusers tool could be made to manipulate internal data structures in ways unintended by the authors. Malformed input may lead to crashes (with a buffer overflow or other memory corruption) or other unspecified behaviors. This crosses a privilege boundary in, for example, certain web-hosting environments in which a Control Panel allows an unprivileged user account to create subaccounts.

Affected products

Published 2017-08-04. Last modified 2026-06-17.