CVE-2021-0236
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: A specific BGP VPNv6 flowspec message causes routing protocol daemon (rpd) process to crash with a core.
Due to an improper check for unusual or exceptional conditions in Juniper Networks Junos OS and Junos OS Evolved the Routing Protocol Daemon (RPD) service, upon receipt of a specific matching BGP packet meeting a specific term in the flowspec configuration, crashes and restarts causing a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue affects only Multiprotocol BGP (MP-BGP) VPNv6 FlowSpec deployments. This issue affects: Juniper Networks Junos OS: 18.4 versions prior to 18.4R1-S8, 18.4R2-S7, 18.4R3-S7; 19.1 versions prior to 19.1R2-S2, 19.1R3-S4; 19.2 versions prior to 19.2R1-S6, 19.2R3-S2; 19.3 versions prior to 19.3R3-S2; 19.4 versions prior to 19.4R2-S4, 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 Evolved: All versions after 18.4R1-EVO prior to 20.3R2-EVO. This issue does not affect: Juniper Networks Junos OS versions prior to 18.4R1. Juniper Networks Junos OS Evolved versions prior to 18.4R1-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-S7, 18.4R3-S7 | Unavailable | None listed |
| 19.1 | affected | custom | 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-S2 | Unavailable | None listed |
| 19.4 | affected | custom | 19.4R2-S4, 19.4R3-S1 | Unavailable | None listed |
| 20.1 | affected | custom | 20.1R2, 20.1R3, 20.1R3-EVO | Unavailable | None listed |
| 20.2 | affected | custom | 20.2R2, 20.2R3, 20.2R3-EVO | Unavailable | None listed |
| 20.3 | affected | custom | 20.3R1-S1, 20.3R2, 20.3R2-EVO | 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 | unaffected | custom | 18.4R1-EVO | Unavailable | None listed |
| 20.3-EVO | affected | custom | 20.3R2-EVO | Unavailable | None listed |