LinOTP replay vulnerability with auto resynchronization enabled for TOTP token

HOCH 8.1CVE-2019-12887 · GHSA-rqg8-xjp2-pg9w · PYSEC-2019-103 · Published 27/06/2019 · updated 17/06/2026

Kurz gesagt

CVE-2019-12887 ist eine Schwachstelle (HOCH (CVSS 8.1)) in linotp, linotp (keyidentity).
Wahrscheinlichkeit einer Ausnutzung in den nächsten 30 Tagen (EPSS): 1.2%, höher als bei 67.6% aller Schwachstellen.
Abhilfe: auf 2.11.1, 2.10.5.3 oder neuer aktualisieren.

Package	Affected versions	Patched versions
linotp PyPI	`< 2.11.1`	`2.11.1`
linotp keyidentity	`< 2.10.5.3`	`2.10.5.3`

Description

LinOTP is prone to a replay attack with activated automatic resynchronization. This vulnerability may allow an attacker to successfully log in with OTP values recorded at a previous point in time.

This attack is only possible if automatic resynchronization is enabled for the TOTP token type. The automatic resynchronization is deactivated by default. All other tokens are unaffected.

NVD description

KeyIdentity LinOTP before 2.10.5.3 has Incorrect Access Control (issue 1 of 2).

References

nvd.nist.gov/vuln/detail/CVE-2019-12887 · ADVISORY
LinOTP/LinOTP commit 6d28d93 · WEB
LinOTP/LinOTP · PACKAGE
pypa/advisory-database · WEB
linotp.org/linotp-hotfix-autoresync.html · WEB
linotp.org/CVE-2019-12887.txt · WEB
GitHub Advisory GHSA-rqg8-xjp2-pg9w · ADVISORY

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