CVE-2021-31351
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: MX Series: Receipt of specific packet on MS-MPC/MS-MIC causes line card reset
An Improper Check for Unusual or Exceptional Conditions in packet processing on the MS-MPC/MS-MIC utilized by Juniper Networks Junos OS allows a malicious attacker to send a specific packet, triggering the MS-MPC/MS-MIC to reset, causing a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue only affects specific versions of Juniper Networks Junos OS on MX Series: 17.3R3-S11; 17.4R2-S13; 17.4R3 prior to 17.4R3-S5; 18.1R3-S12; 18.2R2-S8, 18.2R3-S7, 18.2R3-S8; 18.3R3-S4; 18.4R3-S7; 19.1R3-S4, 19.1R3-S5; 19.2R1-S6; 19.3R3-S2; 19.4R2-S4, 19.4R2-S5; 19.4R3-S2; 20.1R2-S1; 20.2R2-S2, 20.2R2-S3, 20.2R3; 20.3R2, 20.3R2-S1; 20.4R1, 20.4R1-S1, 20.4R2; 21.1R1; This issue does not affect any version of Juniper Networks Junos OS prior to 15.1X49-D240;
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 | 15.1 | Unavailable | None listed |
| 17.3 | unaffected | custom | 17.3R3-S11 | Unavailable | None listed |
| 17.4R3 | unaffected | custom | 17.4* | Unavailable | None listed |
Junos OS
- Vendor
- Juniper Networks
- Product
- Junos OS
- Platforms
- MX Series
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 17.3R3-S11 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 18.1R3-S12 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 18.3R3-S4 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 18.4R3-S7 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 19.1R3-S4, 19.1R3-S5 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 19.2R1-S6 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 19.3R3-S2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 19.4R3-S2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 20.1R2-S1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 20.2R3 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 20.3R2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 17.4R2-S13 | affected | custom | 17.4* | Unavailable | None listed |
| 18.2R2-S8, 18.2R3-S7 | affected | custom | 18.2* | Unavailable | None listed |
| 18.4R1-S8, 18.4R2-S7 | affected | custom | 18.4* | Unavailable | None listed |
| 19.4R2-S4 | affected | custom | 19.4* | Unavailable | None listed |
| 20.2R2-S2 | affected | custom | 20.2* | Unavailable | None listed |
| 20.3R1-S2 | affected | custom | 20.3* | 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 |