Metrics
No CVSS v4.0
Attack Vector Local
Attack Complexity Low
Privileges Required Low
Scope Unchanged
Confidentiality Impact None
Integrity Impact High
Availability Impact High
User Interaction None
No CVSS v3.0
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact Complete
Availability Impact Complete
This CVE is not in the KEV list.
The EPSS score is 0.00038.
Key SSVC decision points have not yet been added.
Affected Vendors & Products
| Vendors | Products |
|---|---|
| Juniper |
|
Configuration 1 [-]
|
No data.
No data.
| Source | ID | Title |
|---|---|---|
EUVD |
EUVD-2021-18270 | An improper privilege management vulnerability in the Juniper Networks Junos OS and Junos OS Evolved command-line interpreter (CLI) allows a low-privileged user to overwrite local files as root, possibly leading to a system integrity issue or Denial of Service (DoS). Depending on the files overwritten, exploitation of this vulnerability could lead to a sustained Denial of Service (DoS) condition, requiring manual user intervention to recover. Systems are only vulnerable if jdhcpd is running, which can be confirmed via the 'show system processes' command. For example: root@host# run show system processes extensive | match dhcp 26537 root -16 0 97568K 13692K RUN 0 0:01 3.71% jdhcpd This issue affects: Juniper Networks Junos OS: All versions, including the following supported releases: 15.1 versions prior to 15.1R7-S10; 17.4 versions prior to 17.4R3-S5; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R3-S9; 19.1 versions prior to 19.1R3-S6; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S3; 19.4 versions prior to 19.4R3-S6; 20.1 versions prior to 20.1R2-S2, 20.1R3-S1; 20.2 versions prior to 20.2R3-S2; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R2-S1, 20.4R3; 21.1 versions prior to 21.1R1-S1, 21.1R2. Juniper Networks Junos OS Evolved: All versions prior to 20.4R2-S3-EVO; All versions of 21.1-EVO. |
Solution
The following software releases have been updated to resolve this specific issue: Junos OS 15.1R7-S10, 17.4R3-S5, 18.3R3-S5, 18.4R3-S9, 19.1R3-S6, 19.2R1-S7, 19.2R3-S3, 19.3R2-S6, 19.3R3-S3, 19.4R3-S6, 20.1R2-S2, 20.1R3-S1, 20.2R3-S2, 20.3R3, 20.4R2-S1, 20.4R3, 21.1R1-S1, 21.1R2, 21.1R3, 21.2R1, and all subsequent releases. Junos OS Evolved 20.4R2-S3-EVO, 21.2R1-EVO, and all subsequent releases.
Workaround
Use access lists or firewall filters to limit access to the device via CLI only from trusted hosts and from trusted administrators.
| Link | Providers |
|---|---|
| https://kb.juniper.net/JSA11222 |
|
No history.
Status: PUBLISHED
Assigner: juniper
Published:
Updated: 2024-09-17T01:31:17.479Z
Reserved: 2021-04-15T00:00:00
Link: CVE-2021-31360
No data.
Status : Modified
Published: 2021-10-19T19:15:09.137
Modified: 2024-11-21T06:05:30.150
Link: CVE-2021-31360
No data.
OpenCVE Enrichment
No data.
EUVD