01 Record
CVE-2021-31367
Junos OS: PTX Series: An FPC heap memory leak will be triggered by certain Flowspec route operations which can lead to an FPC crash
MediumPUBLISHEDCNA: juniper
CNA base score6.5 CVSS v3.xCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
02 Description
Junos OS: PTX Series: An FPC heap memory leak will be triggered by certain Flowspec route operations which can lead to an FPC crash
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
- 0.39% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 33.6% of scored records. A rank, not a probability.
- NVD base score
- 6.5 (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:N/I:N/A:H
- 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 18:16Z5 YR AGO
- Last updated
- 2024-09-16 21:08Z2 YR AGO
- Reserved
- 2021-04-15
- Assigning CNA
- juniper
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 6.5)
- CNA CVSS vector
- CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-401Missing Release of Memory after Effective LifetimeVariant
- Data version
- 5.1
- Document digest
- 7e63def37b1413b87bf1032583f1040fcae3f675efa46580dffac66990c92d76
05 Affected products
VendorProductVersionsPlatforms
Juniper NetworksJunos OS< 18.4R3-S9, 19.1 to < 19.1R3-S7, 19.2 to < 19.2R1-S7, 19.2R3-S3, 19.3 to < 19.3R2-S6, 19.3R3-S3, 19.4 to < 19.4R1-S4, 19.4R3-S6, 20.1 to < 20.1R2-S2, 20.1R3, 20.2 to < 20.2R3-S1, 20.3 to < 20.3R3, 20.4 to < 20.4R3, 21.1 to < 21.1R2PTX Series
06 References
- kb.juniper.nethttps://kb.juniper.net/JSA11229
07 Remediation
The following software releases have been updated to resolve this specific issue in Junos OS: 18.4R3-S9, 19.1R3-S7, 19.2R1-S7, 19.2R3-S3, 19.3R2-S6, 19.3R3-S3, 19.4R1-S4, 20.1R2-S2, 20.1R3, 20.2R3-S1, 20.3R3, 20.4R3, 21.1R2, 21.2R1, and all subsequent releases.