CVE-2021-3571
HIGH
Published Jul 9, 20214y ago · Modified Jun 17, 20262w ago
7.1 CVSS 3.1
Published Jul 9, 2021 4y ago
Last Modified Jun 17, 2026 2w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity None
Availability High
Threat Intelligence
No active exploitation signals — not in CISA KEV and no EPSS score yet.
Exploit & Patch Status
No Known Exploit
Patch Available
Weaknesses 2
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer Memory Safety
CWE-125 Out-of-bounds Read Memory Safety
Affected Products 5
| Vendor | Product | Version | Range |
|---|---|---|---|
| linuxptp_project | linuxptp | * | <2.0.1 |
| linuxptp_project | linuxptp | * | ≥3.0 – <3.1.1 |
| redhat | enterprise_linux | 8.0 | any |
| fedoraproject | fedora | 33 | any |
| fedoraproject | fedora | 34 | any |
References 3
- bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=1966241
- lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RHRUVSDP673LXJ5HGIPQPWPIYUPWYQA7/
- lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUBKTRCMJ6VKS7DIBSZQB4ATSKVCJYXJ/
Remediation
- bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=1966241