CVE-2020-14367

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Summary

CVECVE-2020-14367
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-08-24 15:15:00 UTC
Updated2023-11-07 03:17:00 UTC
DescriptionA 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.

Risk And Classification

Problem Types: CWE-59

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Canonical Ubuntu Linux 18.04 All All All
Operating System Canonical Ubuntu Linux 20.04 All All All
Operating System Fedoraproject Fedora 32 All All All
Operating System Fedoraproject Fedora 32 All All All
Application Tuxfamily Chrony All All All All
Application Tuxfamily Chrony All All All All

References

ReferenceSourceLinkTags
[SECURITY] Fedora 32 Update: chrony-3.5.1-1.fc32 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
1870298 – (CVE-2020-14367) CVE-2020-14367 chrony: Insecure writing to PID file MISC bugzilla.redhat.com Issue Tracking, Patch, Vendor Advisory
[SECURITY] Fedora 32 Update: chrony-3.5.1-1.fc32 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org Mailing List, Third Party Advisory
USN-4475-1: Chrony vulnerability | Ubuntu security notices | Ubuntu UBUNTU usn.ubuntu.com
chrony: Symlink vulnerability (GLSA 202008-23) — Gentoo security GENTOO security.gentoo.org Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 500090 Alpine Linux Security Update for chrony
  • 503761 Alpine Linux Security Update for chrony
  • 6140146 AWS Bottlerocket Security Update for chrony (GHSA-6fxx-9w5c-6729)
  • 690767 Free Berkeley Software Distribution (FreeBSD) Security Update for chrony (719f06af-e45e-11ea-95a1-c3b8167b8026)
  • 751540 SUSE Enterprise Linux Security Update for chrony (SUSE-SU-2021:4147-1)
  • 751894 OpenSUSE Security Update for chrony (openSUSE-SU-2022:0845-1)
  • 751987 SUSE Enterprise Linux Security Update for chrony (SUSE-SU-2022:0845-1)

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