NetBSD Problem Report #58995

From www@netbsd.org  Wed Jan 15 12:33:03 2025
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Date: Wed, 15 Jan 2025 12:33:01 +0000 (UTC)
From: campbell+netbsd@mumble.net
Reply-To: campbell+netbsd@mumble.net
To: gnats-bugs@NetBSD.org
Subject: pam-u2f CVE-2025-23013
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>Number:         58995
>Category:       security
>Synopsis:       pam-u2f CVE-2025-23013
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    security-officer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Jan 15 12:35:00 +0000 2025
>Originator:     Taylor R Campbell
>Release:        
>Organization:
The NetU2F Pamdation
>Environment:
>Description:
pam-u2f needs an update.  Summary from Yubico (https://www.yubico.com/support/security-advisories/ysa-2025-01/):

> Yubico’s open source pam-u2f software package implements a Pluggable
> Authentication Module (PAM) that can be deployed to support
> authentication using a YubiKey or other FIDO compliant authenticators
> on macOS or Linux. This software package has an issue which allows
> for an authentication bypass in some configurations. An attacker
> would require the ability to access the system as an unprivileged
> user. Depending on the configuration, the attacker may also need to
> know the user’s password. To resolve this, Yubico recommends
> customers upgrade to the latest version of pam-u2f.

See also oss-security posting:
https://www.openwall.com/lists/oss-security/2025/01/15/1
>How-To-Repeat:
use and/or abuse pam-u2f
>Fix:
1. maybe work around via clever pam config
2. update pam-u2f
3. audit rest of tree for PAM_IGNORE abuse

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