Cloud Vulnerability DB
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Vulnerability DatabaseCVE-2021-3571
CVE-2021-3571:
NixOS vulnerability analysis and mitigation
Overview
A vulnerability (CVE-2021-3571) was discovered in the ptp4l program of the linuxptp package. The issue affects linuxptp versions before 3.1.1 and before 2.0.1, specifically when ptp4l is operating on a little-endian architecture as a PTP transparent clock (CVE Details, Red Hat).
Technical details
When ptp4l is operating on a little-endian architecture as a PTP transparent clock and forwards a one-step sync message, it generates a follow-up message which has an incorrect length, sending data past the message buffer. The vulnerability has been assigned a CVSS v3 score of 7.1 (Moderate impact) (Red Hat, Bugzilla).
Impact
The highest threats from this vulnerability are to data confidentiality and system availability. The information leak is considered not very useful on its own as ptp4l doesn't handle any sensitive or confidential data like passwords, private keys, etc (Bugzilla).
Mitigation and workarounds
The vulnerability has been fixed in linuxptp versions 3.1.1 and 2.0.1. Updates have been released through various distributions including Red Hat Enterprise Linux 8 via RHSA-2021:4321 and Fedora (Red Hat, Debian).
Additional resources
Source: This report was generated using AI
Related NixOS vulnerabilities:
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