Memory corruption in linuxptp
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · None · High
- Fix status
- Partial Red Hat: 1 fixed, 1 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | linuxptp | linuxptp 3.1.1, linuxptp 2.0.1 | — | No fix listed | CNA |
- linuxptp Vendor— Affected linuxptp 3.1.1, linuxptp 2.0.1 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:linuxptp_project:linuxptp:*:*:*:*:*:*:*:* | before 2.0.1; 3.0 to before 3.1.1 | Vulnerable | Linuxptp Project |
| cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:* | 8.0 | Vulnerable | Red Hat |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 33 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | 34 | Vulnerable | Fedoraproject |
- cpe:2.3:a:linuxptp_project:linuxptp:*:*:*:*:*:*:*:* Versions before 2.0.1; 3.0 to before 3.1.1 Vulnerable ·Linuxptp Project
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:* Versions 8.0 Vulnerable ·Red Hat
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject
Remediation
Red Hat 1 advisory
- RHSA-2021:4321 Released 2021-11-09 · Red Hat rating Moderatelinuxptp security, bug fix, and enhancement update
- Red Hat Enterprise Linux AppStream (v. 8) linuxptp-3.1.1-1.el8
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
linuxptp — FEDORA-2021-a5b584004c
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2021-02519 Memory corruption in linuxptpPriority MEDIUM 43
- Advisory ·
linuxptp — FEDORA-2021-1b42c2f458
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2021-02519 Memory corruption in linuxptpPriority MEDIUM 43
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2021:4321 |
Not affected: 2 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2021-3571
- 2026-10-03 Alias added: GHSA-3v9q-m45q-4cr7
References
Sources
- CVE-2021-3571 · CVE Program
- CVE-2021-3571 · NVD
- FIRST EPSS
- GHSA-3v9q-m45q-4cr7 · GitHub Advisory Database · CC BY 4.0
- CVE-2021-3571 · Red Hat security data · CC BY 4.0
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