Punk::Plugin::TOTP up to 0.04 ptotp_plugin.h authentication replay

Summaryinfo

A vulnerability classified as critical was found in Punk::Plugin::TOTP up to 0.04. The affected element is an unknown function of the file ptotp_plugin.h. The manipulation results in authentication replay. This vulnerability is identified as CVE-2026-78655. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in Punk::Plugin::TOTP up to 0.04. Affected is an unknown function of the file ptotp_plugin.h. The manipulation with an unknown input leads to a authentication replay vulnerability. CWE is classifying the issue as CWE-294. A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes). This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Punk::Plugin::TOTP versions before 0.05 for Perl allow the second-factor attempt limit to be reset by replaying an earlier session cookie because the challenge route counts failures in the session. The POST handler on challenge_path keeps the failure count as tries inside the totp_pending record in the session, raising it on each rejected code and deleting the pending record once it reaches attempts, five by default. Punk::Session carries the session in a signed cookie unless the application declares a store, and keeps no server-side record, so an earlier value of the same session stays valid until the expiry stamped inside it. A client that saves the cookie before its failed attempts and presents it again gets the pending record back with its counter, and the limit never fires. The replayed record is accepted while its own expiry, pending_ttl seconds from the challenge and 300 by default, has not passed. Sessions declared with a store are not affected: the pending record and its counter then live server-side. The attempt limit does not bound guessing of the second factor, which is left to the per-address rate limit the plugin registers on the same path, 30 requests per 60 seconds.

The advisory is available at metacpan.org. This vulnerability is traded as CVE-2026-78655 since 08/25/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1040 by the MITRE ATT&CK project.

Upgrading to version 0.05 eliminates this vulnerability.

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Productinfo

Name

• Punk::Plugin::TOTP

Version

• 0.04

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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