CVE-2021-3571 Information disclosure in linuxptp
A remote attacker can cause an information leak or crash in ptp4l by sending crafted messages when running as a transparent clock on little-endian systems.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-3571?
CVE-2021-3571 is a high-severity vulnerability in Fedoraproject Fedora, published on 9 Jul 2021. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Which versions are affected by CVE-2021-3571?
It affects 3 products.
Linux distribution packages (5)
linuxptp AlmaLinux:8 | All versions | 3.1.1-1.el8 |
linuxptp Red Hat:enterprise_linux:8::appstream | All versions | 0:3.1.1-1.el8 |
linuxptp-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:3.1.1-1.el8 |
linuxptp-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 0:3.1.1-1.el8 |
linuxptp Rocky Linux:8 | All versions | 0:3.1.1-1.el8 |
Products include Fedoraproject Fedora, Linuxptp Project Linuxptp, Redhat Enterprise Linux.
How do I fix CVE-2021-3571?
Upgrade to a fixed version.
Is CVE-2021-3571 being exploited?
There is no known exploitation of CVE-2021-3571 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as ALSA-2021:4321, DEBIAN-CVE-2021-3571, GHSA-3v9q-m45q-4cr7, OESA-2021-1267, RHSA-2021:4321, RLSA-2021:4321.