Vulnerability Details : CVE-2021-3571
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.
Vulnerability category: Overflow
Products affected by CVE-2021-3571
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:*
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
- cpe:2.3:a:linuxptp_project:linuxptp:*:*:*:*:*:*:*:*
- cpe:2.3:a:linuxptp_project:linuxptp:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-3571
0.41%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 59 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-3571
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.5
|
MEDIUM | AV:N/AC:L/Au:S/C:P/I:N/A:P |
8.0
|
4.9
|
NIST | |
|
7.1
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H |
2.8
|
4.2
|
NIST |
CWE ids for CVE-2021-3571
-
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.Assigned by: secalert@redhat.com (Secondary)
-
The product reads data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-3571
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RHRUVSDP673LXJ5HGIPQPWPIYUPWYQA7/
[SECURITY] Fedora 33 Update: linuxptp-3.1.1-1.fc33 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VUBKTRCMJ6VKS7DIBSZQB4ATSKVCJYXJ/
[SECURITY] Fedora 34 Update: linuxptp-3.1.1-1.fc34 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
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https://bugzilla.redhat.com/show_bug.cgi?id=1966241
1966241 – (CVE-2021-3571) CVE-2021-3571 linuxptp: wrong length of one-step follow-up in transparent clockIssue Tracking;Patch;Third Party Advisory
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