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.
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MLIST:[OATH-Toolkit-help] 20131209 libpam-oath vulnerable to replay of OTP as result of incorrectly parsing comments in users file?
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