CVE-2013-7322: Nongnu Oath Toolkit

Medium severity, CVSS 4.9. EPSS: 0.9% chance of exploitation in the next 30 days.

usersfile.c in liboath in OATH Toolkit before 2.4.1 does not properly handle lines containing an invalid one-time-password (OTP) type and a user name in /etc/users.oath, which causes the wrong line to be updated when invalidating an OTP and allows context-dependent attackers to conduct replay attacks, as demonstrated by a commented out line when using libpam-oath.

Affected products

• Nongnu Oath Toolkit: up to and including 2.4.0; version 1.0.0 only; version 1.0.1 only; version 1.2.0 only; version 1.2.1 only; version 1.2.2 only; …

Published 2014-03-09. Last modified 2026-06-17.