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CVE-2013-7322: usersfile.c in liboath in OATH Toolkit before 2.4.1 does not properly handle lines containing an invalid on...

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.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysis

Security readout for executives and security teams

This flaw can let a previously used one-time password remain usable in certain OATH Toolkit PAM setups. The issue is tied to how liboath updates /etc/users.oath when malformed or commented user records are present. Business risk is focused on authentication bypass through OTP replay, not broad remote code execution. Exposure is likely limited to systems using OATH Toolkit liboath or libpam-oath before 2.4.1 with /etc/users.oath-backed OTP authentication. The source bundle does not identify broader affected products, package names, or distributions. Prioritize remediation where OATH Toolkit protects privileged, remote, or production access. The issue can weaken MFA assurance, but available evidence does not show widespread exploitation or unauthenticated system compromise. Mitigation focus: Upgrade OATH Toolkit/liboath to version 2.4.1 or later where applicable.; Review upstream NEWS and vendor package guidance for supported fixes.; Audit /etc/users.oath for malformed, commented, or invalid OTP type entries..

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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2Source links

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Affected products

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