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01 Record

CVE-2021-3031

PAN-OS: Information exposure in Ethernet data frame construction (Etherleak)

MediumPUBLISHEDCNA: palo_alto
CNA base score4.3 CVSS v3.xCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

02 Description

PAN-OS: Information exposure in Ethernet data frame construction (Etherleak)

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
0.54% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 45.6% of scored records. A rank, not a probability.
NVD base score
4.3 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2021-01-13 18:10Z5 YR AGO
Last updated
2024-09-16 16:48Z2 YR AGO
Reserved
2021-01-06
Assigning CNA
palo_alto
Record state
PUBLISHED
Severity
Medium (CVSS 4.3)
CNA CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weaknesses
  • CWE-200Exposure of Sensitive Information to an Unauthorized ActorClass
  • CWE-212Improper Removal of Sensitive Information Before Storage or TransferBase
Data version
5.1
Document digest
0580714a183d565d6687d7a4c4d68635b1c20723b5c835606cf139c25997d74e

05 Affected products

VendorProductVersionsPlatforms
Palo Alto NetworksPAN-OS8.1 to < 8.1.18, 9.0 to < 9.0.12, 9.1 to < 9.1.5PA-200, PA-220, PA-500, PA-800, PA-2000 Series, PA-3000 Series, PA-3200 Series, PA-5200

06 References

07 Remediation

This issue is fixed in PAN-OS 8.1.18, PAN-OS 9.0.12, PAN-OS 9.1.5, and all later PAN-OS versions.