CVE-2021-31350
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Junos OS and Junos OS Evolved: Privilege escalation vulnerability in Juniper Extension Toolkit (JET)
An Improper Privilege Management vulnerability in the gRPC framework, used by the Juniper Extension Toolkit (JET) API on Juniper Networks Junos OS and Junos OS Evolved, allows a network-based, low-privileged authenticated attacker to perform operations as root, leading to complete compromise of the targeted system. The issue is caused by the JET service daemon (jsd) process authenticating the user, then passing configuration operations directly to the management daemon (mgd) process, which runs as root. This issue affects Juniper Networks Junos OS: 18.4 versions prior to 18.4R1-S8, 18.4R2-S8, 18.4R3-S8; 19.1 versions prior to 19.1R2-S3, 19.1R3-S5; 19.2 versions prior to 19.2R1-S7, 19.2R3-S2; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R1-S4, 19.4R2-S4, 19.4R3-S3; 20.1 versions prior to 20.1R2-S2, 20.1R3; 20.2 versions prior to 20.2R2-S3, 20.2R3; 20.3 versions prior to 20.3R2-S1, 20.3R3; 20.4 versions prior to 20.4R2. This issue does not affect Juniper Networks Junos OS versions prior to 18.4R1. Juniper Networks Junos OS Evolved: All versions prior to 20.4R2-EVO; 21.1-EVO versions prior to 21.1R2-EVO.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Junos OS
- Vendor
- Juniper Networks
- Product
- Junos OS
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| unspecified | unaffected | custom | 18.4R1 | Unavailable | None listed |
| 18.4 | affected | custom | 18.4R1-S8, 18.4R2-S8, 18.4R3-S8 | Unavailable | None listed |
| 19.1 | affected | custom | 19.1R2-S3, 19.1R3-S5 | Unavailable | None listed |
| 19.2 | affected | custom | 19.2R1-S7, 19.2R3-S2 | Unavailable | None listed |
| 19.3 | affected | custom | 19.3R2-S6, 19.3R3-S2 | Unavailable | None listed |
| 19.4 | affected | custom | 19.4R1-S4, 19.4R2-S4, 19.4R3-S3 | Unavailable | None listed |
| 20.1 | affected | custom | 20.1R2-S2, 20.1R3 | Unavailable | None listed |
| 20.2 | affected | custom | 20.2R2-S3, 20.2R3 | Unavailable | None listed |
| 20.3 | affected | custom | 20.3R2-S1, 20.3R3 | Unavailable | None listed |
| 20.4 | affected | custom | 20.4R2 | Unavailable | None listed |
Junos OS Evolved
- Vendor
- Juniper Networks
- Product
- Junos OS Evolved
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| unspecified | affected | custom | 20.4R2-EVO | Unavailable | None listed |
| 21.1-EVO | affected | custom | 21.1R2-EVO | Unavailable | None listed |