01 Record
CVE-2021-31369
Junos OS: MX Series: Traffic drops will be observed if MS-MPC/MS-PIC resources are consumed by certain traffic causing a partial DoS
MediumPUBLISHEDCNA: juniper
CNA base score5.3 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
02 Description
Junos OS: MX Series: Traffic drops will be observed if MS-MPC/MS-PIC resources are consumed by certain traffic causing a partial DoS
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
- 0.97% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 61.6% of scored records. A rank, not a probability.
- NVD base score
- 5.3 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- 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
- 2024-09-16 18:34Z2 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:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Weaknesses
- CWE-770Allocation of Resources Without Limits or ThrottlingBase
- Data version
- 5.1
- Document digest
- 38c61bc47397728c51e9b3a3b79a3e652f18cae7d91f8b5df6a696f6c065ee38
05 Affected products
VendorProductVersionsPlatforms
Juniper NetworksJunos OS< 17.4R3-S5, 18.3 to < 18.3R3-S5, 18.4 to < 18.4R3-S9, 19.1 to < 19.1R3-S6, 19.2 to < 19.2R1-S7, 19.2R3-S3, 19.3 to < 19.3R2-S7, 19.3R3-S3, 19.4 to < 19.4R3-S5, 20.1 to < 20.1R2-S2, 20.1R3-S1, 20.2 to < 20.2R3-S2, 20.3 to < 20.3R3, 20.4 to < 20.4R2-S1, 20.4R3, 21.1 to < 21.1R1-S1, 21.1R2MX Series
06 References
- kb.juniper.nethttps://kb.juniper.net/JSA11231
07 Remediation
The following software releases have been updated to resolve this specific issue: 17.4R3-S5, 18.3R3-S5, 18.4R3-S9, 19.1R3-S6, 19.2R1-S7, 19.2R3-S3, 19.3R2-S7, 19.3R3-S3, 19.4R3-S5, 20.1R2-S2, 20.1R3-S1, 20.2R3-S2, 20.3R3, 20.4R2-S1, 20.4R3, 21.1R1-S1, 21.1R2, 21.2R1, and all subsequent releases.