{"document":{"aggregate_severity":{"namespace":"https://www.suse.com/support/security/rating/","text":"important"},"category":"csaf_vex","csaf_version":"2.0","distribution":{"text":"Copyright 2024 SUSE LLC. All rights reserved.","tlp":{"label":"WHITE","url":"https://www.first.org/tlp/"}},"lang":"en","notes":[{"category":"summary","text":"SUSE CVE-2021-31924","title":"Title"},{"category":"description","text":"Yubico pam-u2f before 1.1.1 has a logic issue that, depending on the pam-u2f configuration and the application used, could lead to a local PIN bypass. This issue does not allow user presence (touch) or cryptographic signature verification to be bypassed, so an attacker would still need to physically possess and interact with the YubiKey or another enrolled authenticator. If pam-u2f is configured to require PIN authentication, and the application using pam-u2f allows the user to submit NULL as the PIN, pam-u2f will attempt to perform a FIDO2 authentication without PIN. If this authentication is successful, the PIN requirement is bypassed.","title":"Description of the CVE"},{"category":"legal_disclaimer","text":"CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).","title":"Terms of use"}],"publisher":{"category":"vendor","contact_details":"https://www.suse.com/support/security/contact/","name":"SUSE Product Security Team","namespace":"https://www.suse.com/"},"references":[{"category":"external","summary":"CVE-2021-31924","url":"https://www.suse.com/security/cve/CVE-2021-31924"},{"category":"external","summary":"SUSE Security Ratings","url":"https://www.suse.com/support/security/rating/"},{"category":"external","summary":"SUSE Bug 1186577 for CVE-2021-31924","url":"https://bugzilla.suse.com/1186577"}],"title":"SUSE CVE 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This issue does not allow user presence (touch) or cryptographic signature verification to be bypassed, so an attacker would still need to physically possess and interact with the YubiKey or another enrolled authenticator. If pam-u2f is configured to require PIN authentication, and the application using pam-u2f allows the user to submit NULL as the PIN, pam-u2f will attempt to perform a FIDO2 authentication without PIN. If this authentication is successful, the PIN requirement is bypassed.","title":"CVE description"}],"product_status":{"known_not_affected":["SUSE CaaS Platform 4.0:pam_u2f","SUSE Enterprise Storage 6:pam_u2f","SUSE Enterprise Storage 7:pam_u2f","SUSE Linux Enterprise Desktop 15 SP2:pam_u2f","SUSE Linux Enterprise High Performance Computing 12 SP5:pam_u2f","SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS:pam_u2f","SUSE Linux Enterprise High Performance Computing 15 SP2:pam_u2f","SUSE Linux Enterprise High Performance Computing 15-LTSS:pam_u2f","SUSE Linux Enterprise Module for Basesystem 15 SP2:pam_u2f","SUSE Linux Enterprise Server 12 SP4-ESPOS:pam_u2f","SUSE Linux Enterprise Server 12 SP4-LTSS:pam_u2f","SUSE Linux Enterprise Server 12 SP5:pam_u2f","SUSE Linux Enterprise Server 15 SP1-LTSS:pam_u2f","SUSE Linux Enterprise Server 15 SP2:pam_u2f","SUSE Linux Enterprise Server 15-ESPOS:pam_u2f","SUSE Linux Enterprise Server 15-LTSS:pam_u2f","SUSE Linux Enterprise Server 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Ratings","url":"https://www.suse.com/support/security/rating/"},{"category":"external","summary":"SUSE Bug 1186577 for CVE-2021-31924","url":"https://bugzilla.suse.com/1186577"}],"remediations":[{"category":"vendor_fix","details":"To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n","product_ids":["SUSE Linux Enterprise Desktop 15 SP4:pam_u2f-1.2.0-150400.2.4","SUSE Linux Enterprise Desktop 15 SP5:pam_u2f-1.2.0-150400.2.4","SUSE Linux Enterprise Desktop 15 SP6:pam_u2f-1.2.0-150600.8.3","SUSE Linux Enterprise Desktop 15 SP7:pam_u2f-1.2.0-150600.10.8.1","SUSE Linux Enterprise High Performance Computing 15 SP4:pam_u2f-1.2.0-150400.2.4","SUSE Linux Enterprise High Performance Computing 15 SP5:pam_u2f-1.2.0-150400.2.4","SUSE Linux Enterprise High Performance Computing 15 SP6:pam_u2f-1.2.0-150600.8.3","SUSE Linux Enterprise High Performance Computing 15 SP7:pam_u2f-1.2.0-150600.10.8.1","SUSE Linux Enterprise Micro 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