CVE-2021-0267
CVSS V2 Low 3.3
CVSS V3 Medium 6.5
Description
An Improper Input Validation vulnerability in the active-lease query portion in JDHCPD's DHCP Relay Agent of Juniper Networks Junos OS allows an attacker to cause a Denial of Service (DoS) by sending a crafted DHCP packet to the device thereby crashing the jdhcpd DHCP service. This is typically configured for Broadband Subscriber Sessions. Continued receipt and processing of this crafted packet will create a sustained Denial of Service (DoS) condition. This issue affects Juniper Networks Junos OS: 19.4 versions prior to 19.4R3-S1; 20.1 versions prior to 20.1R2-S1, 20.1R3; 20.2 versions prior to 20.2R3; 20.3 versions prior to 20.3R2. This issue does not affect Junos OS Evolved.
Overview
- CVE ID
- CVE-2021-0267
- Assigner
- sirt@juniper.net
- Vulnerability Status
- Analyzed
- Published Version
- 2021-04-22T20:15:09
- Last Modified Date
- 2021-07-23T19:10:56
Weakness Enumerations
CPE Configuration (Product)
CPE | Vulnerable | Operator | Version Start | Version End |
---|---|---|---|---|
cpe:2.3:o:juniper:junos:19.4:r1:*:*:*:*:*:* | 1 | OR | ||
cpe:2.3:o:juniper:junos:19.4:r1-s1:*:*:*:*:*:* | 1 | OR | ||
cpe:2.3:o:juniper:junos:19.4:r1-s2:*:*:*:*:*:* | 1 | OR | ||
cpe:2.3:o:juniper:junos:19.4:r2:*:*:*:*:*:* | 1 | OR | ||
cpe:2.3:o:juniper:junos:19.4:r2-s1:*:*:*:*:*:* | 1 | OR | ||
cpe:2.3:o:juniper:junos:19.4:r2-s2:*:*:*:*:*:* | 1 | OR | ||
cpe:2.3:o:juniper:junos:19.4:r3:*:*:*:*:*:* | 1 | OR | ||
cpe:2.3:o:juniper:junos:20.1:r1:*:*:*:*:*:* | 1 | OR | ||
cpe:2.3:o:juniper:junos:20.1:r1-s1:*:*:*:*:*:* | 1 | OR | ||
cpe:2.3:o:juniper:junos:20.1:r1-s2:*:*:*:*:*:* | 1 | OR | ||
cpe:2.3:o:juniper:junos:20.1:r1-s3:*:*:*:*:*:* | 1 | OR | ||
cpe:2.3:o:juniper:junos:20.1:r1-s4:*:*:*:*:*:* | 1 | OR | ||
cpe:2.3:o:juniper:junos:20.1:r2:*:*:*:*:*:* | 1 | OR | ||
cpe:2.3:o:juniper:junos:20.2:r1:*:*:*:*:*:* | 1 | OR | ||
cpe:2.3:o:juniper:junos:20.2:r1-s1:*:*:*:*:*:* | 1 | OR | ||
cpe:2.3:o:juniper:junos:20.2:r1-s2:*:*:*:*:*:* | 1 | OR | ||
cpe:2.3:o:juniper:junos:20.2:r1-s3:*:*:*:*:*:* | 1 | OR | ||
cpe:2.3:o:juniper:junos:20.2:r2:*:*:*:*:*:* | 1 | OR | ||
cpe:2.3:o:juniper:junos:20.2:r2-s1:*:*:*:*:*:* | 1 | OR | ||
cpe:2.3:o:juniper:junos:20.2:r2-s2:*:*:*:*:*:* | 1 | OR | ||
cpe:2.3:o:juniper:junos:20.2:r2-s3:*:*:*:*:*:* | 1 | OR | ||
cpe:2.3:o:juniper:junos:20.3:r1:*:*:*:*:*:* | 1 | OR | ||
cpe:2.3:o:juniper:junos:20.3:r1-s1:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:A/AC:L/Au:N/C:N/I:N/A:P
- Access Vector
- ADJACENT_NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 3.3
- Severity
- LOW
- Exploitability Score
- 6.5
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Attack Vector
- ADJACENT_NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 6.5
- Base Severity
- MEDIUM
- Exploitability Score
- 2.8
- Impact Score
- 3.6
References
Reference URL | Reference Tags |
---|---|
https://kb.juniper.net/JSA11158 | Vendor Advisory |
https://www.juniper.net/documentation/us/en/software/junos/subscriber-mgmt-sessions/topics/ref/statement/active-leasequery-edit-forwarding-options.html | Vendor Advisory |
Sources
Source Name | Source URL |
---|---|
NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-0267 |
MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0267 |
History
Created | Old Value | New Value | Data Type | Notes |
---|---|---|---|---|
2022-05-10 15:53:02 | Added to TrackCVE | |||
2022-12-06 02:22:13 | 2021-04-22T20:15Z | 2021-04-22T20:15:09 | CVE Published Date | updated |
2022-12-06 02:22:13 | 2021-07-23T19:10:56 | CVE Modified Date | updated | |
2022-12-06 02:22:13 | Analyzed | Vulnerability Status | updated |