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Vulnerability · Published Jul 9, 2021 · Assigned by redhat

CVE-2021-3571

High 7.1

In plain English

A high-severity memory corruption in linuxptp. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.9% (higher than 80% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.1High
Exploit odds (30 days)1.9%top 20.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

A flaw was found in the ptp4l program of the linuxptp package. When ptp4l is operating on a little-endian architecture as a PTP transparent clock, a remote attacker could send a crafted one-step sync message to cause an information leak or crash. The highest threat from this vulnerability is to data confidentiality and system availability. This flaw affects linuxptp versions before 3.1.1 and before 2.0.1.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8linuxptp3.1.1-1.el8ALSA-2021:4321
Debian:12linuxptp3.1-2.1DEBIAN-CVE-2021-3571
Debian:13linuxptp3.1-2.1DEBIAN-CVE-2021-3571
Debian:14linuxptp3.1-2.1DEBIAN-CVE-2021-3571
Rocky Linux:8linuxptp0:3.1.1-1.el8RLSA-2021:4321
Ubuntu:22.04:LTSlinuxptp3.1-2.1UBUNTU-CVE-2021-3571

Affected products (as reported)

VendorProductVersions
n/a linuxptp linuxptp 3.1.1, linuxptp 2.0.1

Weakness: CWE-119

References