Upstream information

CVE-2020-14367 at MITRE

Description

A flaw was found in chrony versions before 3.5.1 when creating the PID file under the /var/run/chrony folder. The file is created during chronyd startup while still running as the root user, and when it's opened for writing, chronyd does not check for an existing symbolic link with the same file name. This flaw allows an attacker with privileged access to create a symlink with the default PID file name pointing to any destination file in the system, resulting in data loss and a denial of service due to the path traversal.

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 3.6
Vector AV:L/AC:L/Au:N/C:N/I:P/A:P
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact Partial
CVSS v3 Scores
  National Vulnerability Database SUSE
Base Score 6 6
Vector CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
Access Vector Local Local
Access Complexity Low Low
Privileges Required High High
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact None None
Integrity Impact High High
Availability Impact High High
CVSSv3 Version 3.1 3.1

Note from the SUSE Security Team

This does not affect SUSE Linux Enterprise, the issue was only in newer versions of chrony packaged by SUSE.

SUSE Bugzilla entry: 1174911 [NEW]

No SUSE Security Announcements cross referenced.


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Please note that this evaluation state might be work in progress, incomplete or outdated.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 High Performance Computing 12 SP4 chrony Not affected
SUSE Linux Enterprise High Performance Computing 12 SP5 chrony Not affected
SUSE Linux Enterprise High Performance Computing 15 LTSS chrony Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP1 chrony Not affected
SUSE Linux Enterprise Module for Basesystem 15 SP2 chrony Not affected
SUSE Linux Enterprise Server 12 SP2 BCL chrony Not affected
SUSE Linux Enterprise Server 12 SP2 LTSS chrony Not affected
SUSE Linux Enterprise Server 12 SP3 BCL chrony Not affected
SUSE Linux Enterprise Server 12 SP3 LTSS chrony Not affected
SUSE Linux Enterprise Server 12 SP4 chrony Not affected
SUSE Linux Enterprise Server 12 SP4 LTSS chrony Not affected
SUSE Linux Enterprise Server 12 SP5 chrony Not affected
SUSE Linux Enterprise Server 15 LTSS chrony Not affected
SUSE Linux Enterprise Server ESPOS 15 chrony Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP2 chrony Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP3 chrony Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP4 chrony Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP5 chrony Not affected