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Debian LTS Advisory DLA-2723-1                [email protected]
https://www.debian.org/lts/security/                    Thorsten Alteholz
July 31, 2021                                 https://wiki.debian.org/LTS
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Package        : linuxptp
Version        : 1.8-1+deb9u1
CVE ID         : CVE-2021-3570

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 

For Debian 9 stretch, this problem has been fixed in version

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: https://wiki.debian.org/LTS