CVE-2021-3571

NameCVE-2021-3571
DescriptionA 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium
Debian Bugs990749

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linuxptp (PTS)stretch1.8-1fixed
stretch (security)1.8-1+deb9u1fixed
buster1.9.2-1fixed
buster (security)1.9.2-1+deb10u1fixed
bullseye3.1-2.1fixed
bookworm, sid3.1.1-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxptpsourcestretch(not affected)
linuxptpsourcebuster(not affected)
linuxptpsource(unstable)3.1-2.1990749

Notes

[buster] - linuxptp <not-affected> (Vulnerable code introduced later, transparent clock implementation in v2.0)
[stretch] - linuxptp <not-affected> (Vulnerable code introduced later, transparent clock implementation in v2.0)
https://github.com/richardcochran/linuxptp/commit/d61d77e163dbee247819f3d88593ba111577af15 (master)
https://github.com/richardcochran/linuxptp/commit/0b3ab45de6a96ca181a5cf62c3c2b97167e2ed20 (v3.1.1)
https://www.openwall.com/lists/oss-security/2021/07/06/1

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