Upstream information

CVE-2018-20340 at MITRE

Description

Yubico libu2f-host 1.1.6 contains unchecked buffers in devs.c, which could enable a malicious token to exploit a buffer overflow. An attacker could use this to attempt to execute malicious code using a crafted USB device masquerading as a security token on a computer where the affected library is currently in use. It is not possible to perform this attack with a genuine YubiKey.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having moderate severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 4.6
Vector AV:L/AC:L/Au:N/C:P/I:P/A:P
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
CVSS v3 Scores
  National Vulnerability Database SUSE
Base Score 6.8 6.4
Vector AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Access Vector Physical Physical
Access Complexity Low High
Privileges Required None None
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact High High
Integrity Impact High High
Availability Impact High High
SUSE Bugzilla entry: 1124781 [NEW]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
SUSE Linux Enterprise Desktop 12 SP4
  • libu2f-host >= 1.1.6-3.5.1
  • libu2f-host0 >= 1.1.6-3.5.1
  • pam_u2f >= 1.0.8-3.3.1
Patchnames:
SUSE-SLE-DESKTOP-12-SP4-2019-1749
SUSE Linux Enterprise Module for Basesystem 15
  • libu2f-host >= 1.1.6-3.3.3
  • libu2f-host-devel >= 1.1.6-3.3.3
  • libu2f-host0 >= 1.1.6-3.3.3
Patchnames:
SUSE-SLE-Module-Basesystem-15-2019-1340
SUSE Linux Enterprise Module for Open Buildservice Development Tools 15
  • libu2f-host >= 1.1.6-3.3.3
  • libu2f-host-doc >= 1.1.6-3.3.3
  • u2f-host >= 1.1.6-3.3.3
Patchnames:
SUSE-SLE-Module-Development-Tools-OBS-15-2019-1340
SUSE Linux Enterprise Server 12 SP4
  • libu2f-host >= 1.1.6-3.5.1
  • libu2f-host0 >= 1.1.6-3.5.1
  • pam_u2f >= 1.0.8-3.3.1
Patchnames:
SUSE-SLE-SERVER-12-SP4-2019-1749
SUSE Linux Enterprise Server for SAP Applications 12 SP4
  • libu2f-host >= 1.1.6-3.5.1
  • libu2f-host0 >= 1.1.6-3.5.1
  • pam_u2f >= 1.0.8-3.3.1
Patchnames:
SUSE-SLE-SERVER-12-SP4-2019-1749
openSUSE Leap 15.0
  • libu2f-host >= 1.1.6-lp150.7.1
  • libu2f-host-debuginfo >= 1.1.6-lp150.7.1
  • libu2f-host-debugsource >= 1.1.6-lp150.7.1
  • libu2f-host-devel >= 1.1.6-lp150.7.1
  • libu2f-host-doc >= 1.1.6-lp150.7.1
  • libu2f-host0 >= 1.1.6-lp150.7.1
  • libu2f-host0-debuginfo >= 1.1.6-lp150.7.1
  • u2f-host >= 1.1.6-lp150.7.1
  • u2f-host-debuginfo >= 1.1.6-lp150.7.1
Patchnames:
openSUSE-2019-1475
openSUSE Leap 15.1
  • libu2f-host >= 1.1.6-lp151.2.3.1
  • libu2f-host-debuginfo >= 1.1.6-lp151.2.3.1
  • libu2f-host-debugsource >= 1.1.6-lp151.2.3.1
  • libu2f-host-devel >= 1.1.6-lp151.2.3.1
  • libu2f-host-doc >= 1.1.6-lp151.2.3.1
  • libu2f-host0 >= 1.1.6-lp151.2.3.1
  • libu2f-host0-debuginfo >= 1.1.6-lp151.2.3.1
  • u2f-host >= 1.1.6-lp151.2.3.1
  • u2f-host-debuginfo >= 1.1.6-lp151.2.3.1
Patchnames:
openSUSE-2019-1475
openSUSE Leap 42.3
  • libu2f-host >= 1.0.0-5.3.1
  • libu2f-host-debugsource >= 1.0.0-5.3.1
  • libu2f-host-devel >= 1.0.0-5.3.1
  • libu2f-host-doc >= 1.0.0-5.3.1
  • libu2f-host0 >= 1.0.0-5.3.1
  • libu2f-host0-debuginfo >= 1.0.0-5.3.1
  • u2f-host >= 1.0.0-5.3.1
  • u2f-host-debuginfo >= 1.0.0-5.3.1
Patchnames:
openSUSE-2019-199


Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.

Product(s) Source package State
SUSE Linux Enterprise Desktop 12 SP4 libu2f-host Released
SUSE Linux Enterprise High Performance Computing 12 libu2f-host Released
SUSE Linux Enterprise Module for Basesystem 15 GA libu2f-host Released
SUSE Linux Enterprise Server 12 SP4 libu2f-host Released
SUSE Linux Enterprise Server for SAP Applications 12 SP4 libu2f-host Released