synced 7 MIN AGO
01 Record

CVE-2021-31386

Junos OS: When using J-Web with HTTP an attacker may retrieve encryption keys via Person-in-the-Middle attacks.

MediumPUBLISHEDCNA: juniper
CNA base score5.3 CVSS v3.xCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
View raw JSON

02 Description

Junos OS: When using J-Web with HTTP an attacker may retrieve encryption keys via Person-in-the-Middle attacks.

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
0.71% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 53.1% of scored records. A rank, not a probability.
NVD base score
5.9 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/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
2021-10-19 18:17Z5 YR AGO
Last updated
2024-09-17 01:16Z2 YR AGO
Reserved
2021-04-15
Assigning CNA
juniper
Record state
PUBLISHED
Severity
Medium (CVSS 5.3)
CNA CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Weaknesses
  • CWE-300Channel Accessible by Non-EndpointClass
  • CWE-311Missing Encryption of Sensitive DataClass
  • CWE-325Missing Cryptographic StepBase
  • CWE-693Protection Mechanism FailurePillar
Data version
5.1
Document digest
f05cb8353a26edbb991c2757b5b19ab0496a0a7569fea91fd4079d5c6946b1c9

05 Affected products

VendorProductVersionsPlatforms
Juniper NetworksJunos OS12.3 to < 12.3R12-S20, 15.1 to < 15.1R7-S11, 18.3 to < 18.3R3-S6, 18.4 to < 18.4R3-S10, 19.1 to < 19.1R3-S7, 19.2 to < 19.2R3-S4, 19.3 to < 19.3R3-S4, 19.4 to < 19.4R3-S6, 20.1 to < 20.1R3-S2, 20.2 to < 20.2R3-S3, 20.3 to < 20.3R3-S1, 20.4 to < 20.4R3, 21.1 to < 21.1R3, 21.2 to < 21.2R2—

06 References

07 Remediation

The following software releases have been updated to resolve this specific issue: 12.3R12-S20, 15.1R7-S11, 18.3R3-S6, 18.4R3-S10, 19.1R3-S7, 19.2R3-S4, 19.3R3-S4, 19.4R3-S6, 20.1R3-S2, 20.2R3-S3, 20.3R3-S1, 20.4R3, 21.1R3, 21.2R2, 21.3R1, and all subsequent releases. Note: Use of HTTP must also be discontinued.