Debian Security Advisory

DLA-2723-1 linuxptp -- LTS security update

Date Reported:
31 Jul 2021
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2021-3570.
More information:

Miroslav Lichvar reported that the ptp4l program in linuxptp, an implementation of the Precision Time Protocol (PTP), does not validate the messageLength field of incoming messages, allowing a remote attacker to cause a denial of service, information leak, or potentially remote code execution.

For Debian 9 stretch, this problem has been fixed in version 1.8-1+deb9u1.

We recommend that you upgrade your linuxptp packages.

For the detailed security status of linuxptp please refer to its security tracker page at:

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: