CVE-2021-31361
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: QFX Series and PTX Series: FPC resource usage increases when certain packets are processed which are being VXLAN encapsulated
An Improper Check for Unusual or Exceptional Conditions vulnerability combined with Improper Handling of Exceptional Conditions in Juniper Networks Junos OS on QFX Series and PTX Series allows an unauthenticated network based attacker to cause increased FPC CPU utilization by sending specific IP packets which are being VXLAN encapsulated leading to a partial Denial of Service (DoS). Continued receipted of these specific traffic will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS on QFX Series: All versions prior to 17.3R3-S11; 17.4 versions prior to 17.4R2-S13, 17.4R3-S4; 18.1 versions prior to 18.1R3-S12; 18.2 versions prior to 18.2R2-S8, 18.2R3-S7; 18.3 versions prior to 18.3R3-S4; 18.4 versions prior to 18.4R1-S8, 18.4R2-S7, 18.4R3-S7; 19.1 versions prior to 19.1R1-S6, 19.1R2-S2, 19.1R3-S4; 19.2 versions prior to 19.2R1-S6, 19.2R3-S2; 19.3 versions prior to 19.3R3-S1; 19.4 versions prior to 19.4R2-S3, 19.4R3-S1; 20.1 versions prior to 20.1R2, 20.1R3; 20.2 versions prior to 20.2R2, 20.2R3; 20.3 versions prior to 20.3R1-S1, 20.3R2. Juniper Networks Junos OS on PTX Series: All 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 19.4R1-S4, 19.4R3-S5; 20.1 versions prior to 20.1R2-S2, 20.1R3; 20.2 versions prior to 20.2R3-S1; 20.3 versions prior to 20.3R2-S1, 20.3R3; 20.4 versions prior to 20.4R2-S1, 20.4R3; 21.1 versions prior to 21.1R1-S1, 21.1R2.
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
- QFX Series
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| unspecified | affected | custom | 17.3R3-S11 | Unavailable | None listed |
| 17.4 | affected | custom | 17.4R2-S13, 17.4R3-S4 | Unavailable | None listed |
| 18.1 | affected | custom | 18.1R3-S12 | Unavailable | None listed |
| 18.2 | affected | custom | 18.2R2-S8, 18.2R3-S7 | Unavailable | None listed |
| 18.3 | affected | custom | 18.3R3-S4 | Unavailable | None listed |
| 18.4 | affected | custom | 18.4R1-S8, 18.4R2-S7, 18.4R3-S7 | Unavailable | None listed |
| 19.1 | affected | custom | 19.1R1-S6, 19.1R2-S2, 19.1R3-S4 | Unavailable | None listed |
| 19.2 | affected | custom | 19.2R1-S6, 19.2R3-S2 | Unavailable | None listed |
| 19.3 | affected | custom | 19.3R3-S1 | Unavailable | None listed |
| 19.4 | affected | custom | 19.4R2-S3, 19.4R3-S1 | Unavailable | None listed |
| 20.1 | affected | custom | 20.1R2, 20.1R3 | Unavailable | None listed |
| 20.2 | affected | custom | 20.2R2, 20.2R3 | Unavailable | None listed |
| 20.3 | affected | custom | 20.3R1-S1, 20.3R2 | Unavailable | None listed |
Junos OS
- Vendor
- Juniper Networks
- Product
- Junos OS
- Platforms
- PTX Series
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| unspecified | affected | custom | 18.4R3-S9 | Unavailable | None listed |
| 19.1 | affected | custom | 19.1R3-S6 | Unavailable | None listed |
| 19.2 | affected | custom | 19.2R1-S7, 19.2R3-S3 | Unavailable | None listed |
| 19.3 | affected | custom | 19.3R2-S6, 19.3R3-S3 | Unavailable | None listed |
| 19.4 | affected | custom | 19.4R1-S4, 19.4R3-S5 | Unavailable | None listed |
| 20.1 | affected | custom | 20.1R2-S2, 20.1R3 | Unavailable | None listed |
| 20.2 | affected | custom | 20.2R3-S1 | Unavailable | None listed |
| 20.3 | affected | custom | 20.3R2-S1, 20.3R3 | Unavailable | None listed |
| 20.4 | affected | custom | 20.4R2-S1, 20.4R3 | Unavailable | None listed |
| 21.1 | affected | custom | 21.1R1-S1, 21.1R2 | Unavailable | None listed |