Home/CVE/A flaw was found in the ptp4l program of the linuxptp package. When ptp4l is operating on a little-endian architecture a
CVE

CVE-2021-3571

A flaw was found in the ptp4l program of the linuxptp package. When ptp4l is operating on a little-endian architecture a

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.

HIGH · CVSS 7.1 EPSS 0.0072
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-125Out-of-bounds Read
▤

Affected Products & Versions

4
linuxptp project linuxptp< 2.0.1
linuxptp project linuxptp>= 3.0 and < 3.1.1
redhat enterprise linuxall versions
fedoraproject fedoraall versions
▣

Scoring & Timeline

7.1
HIGH · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD09 Jul 2021 · 11:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
⚑

Vendor Advisories

2
msrcCVE-2021-3571
rhsaRHSA-2021:4321Moderate
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugzilla.redhat.com/show_bug.cgi?id=1966241Issue TrackingPatchThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RHRUVSDP673LXJ5HGIPQPWPIYUPWYQA7/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUBKTRCMJ6VKS7DIBSZQB4ATSKVCJYXJ/
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