CVE-2021-31376
CVSS V2 Medium 5
CVSS V3 High 7.5
Description
An Improper Input Validation vulnerability in Packet Forwarding Engine manager (FXPC) process of Juniper Networks Junos OS allows an attacker to cause a Denial of Service (DoS) by sending specific DHCPv6 packets to the device and crashing the FXPC service. Continued receipt and processing of this specific packet will create a sustained Denial of Service (DoS) condition. This issue affects only the following platforms in ACX Series: ACX500, ACX1000, ACX1100, ACX2100, ACX2200, ACX4000, ACX5048, ACX5096 devices. Other ACX platforms are not affected from this issue. This issue affects Juniper Networks Junos OS on ACX500, ACX1000, ACX1100, ACX2100, ACX2200, ACX4000, ACX5048, ACX5096: 18.4 version 18.4R3-S7 and later versions prior to 18.4R3-S8. This issue does not affect: Juniper Networks Junos OS 18.4 versions prior to 18.4R3-S7 on ACX500, ACX1000, ACX1100, ACX2100, ACX2200, ACX4000, ACX5048, ACX5096.
Overview
- CVE ID
- CVE-2021-31376
- Assigner
- sirt@juniper.net
- Vulnerability Status
- Analyzed
- Published Version
- 2021-10-19T19:15:10
- Last Modified Date
- 2021-10-25T16:20:45
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:o:juniper:junos:18.4:r3-s7:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:juniper:acx1000:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:juniper:acx1100:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:juniper:acx2100:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:juniper:acx2200:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:juniper:acx4000:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:juniper:acx500:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:juniper:acx5048:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:juniper:acx5096:-:*:*:*:*:*:*:* | 0 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:N/C:N/I:N/A:P
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 5
- Severity
- MEDIUM
- Exploitability Score
- 10
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 7.5
- Base Severity
- HIGH
- Exploitability Score
- 3.9
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://kb.juniper.net/JSA11241 | Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-31376 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31376 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:50:01 | Added to TrackCVE | |||
| 2022-12-05 12:43:23 | 2021-10-19T19:15Z | 2021-10-19T19:15:10 | CVE Published Date | updated |
| 2022-12-05 12:43:23 | 2021-10-25T16:20:45 | CVE Modified Date | updated | |
| 2022-12-05 12:43:23 | Analyzed | Vulnerability Status | updated |