CVE-2021-31367
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: PTX Series: An FPC heap memory leak will be triggered by certain Flowspec route operations which can lead to an FPC crash
A Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on PTX Series allows an adjacent attacker to cause a Denial of Service (DoS) by sending genuine BGP flowspec packets which cause an FPC heap memory leak. Once having run out of memory the FPC will crash and restart along with a core dump. Continued receipted of these packets will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS All versions prior to 18.4R3-S9; 19.1 versions prior to 19.1R3-S7; 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-S6; 20.1 versions prior to 20.1R2-S2, 20.1R3; 20.2 versions prior to 20.2R3-S1; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R3; 21.1 versions prior to 21.1R2. Juniper Networks Junos Evolved is not affected.
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
- 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-S7 | 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-S6 | 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 | 20.3R3 | Unavailable | None listed |
| 20.4 | affected | custom | 20.4R3 | Unavailable | None listed |
| 21.1 | affected | custom | 21.1R2 | Unavailable | None listed |