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Vulnerability Details : CVE-2021-0267

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.
Publish Date : 2021-04-22 Last Update Date : 2021-07-23
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service

- Products Affected By CVE-2021-0267

# Product Type Vendor Product Version Update Edition Language
1 OS Juniper Junos 19.4 R1-s2 * * Version Details Vulnerabilities
2 OS Juniper Junos 19.4 R2 * * Version Details Vulnerabilities
3 OS Juniper Junos 19.4 R2-s1 * * Version Details Vulnerabilities
4 OS Juniper Junos 19.4 R2-s2 * * Version Details Vulnerabilities
5 OS Juniper Junos 19.4 R1 * * Version Details Vulnerabilities
6 OS Juniper Junos 19.4 R3 * * Version Details Vulnerabilities
7 OS Juniper Junos 19.4 R1-s1 * * Version Details Vulnerabilities
8 OS Juniper Junos 20.1 R1 * * Version Details Vulnerabilities
9 OS Juniper Junos 20.1 R1-s1 * * Version Details Vulnerabilities
10 OS Juniper Junos 20.1 R1-s2 * * Version Details Vulnerabilities
11 OS Juniper Junos 20.1 R1-s4 * * Version Details Vulnerabilities
12 OS Juniper Junos 20.1 R1-s3 * * Version Details Vulnerabilities
13 OS Juniper Junos 20.1 R2 * * Version Details Vulnerabilities
14 OS Juniper Junos 20.2 R2 * * Version Details Vulnerabilities
15 OS Juniper Junos 20.2 R1-s2 * * Version Details Vulnerabilities
16 OS Juniper Junos 20.2 R2-s1 * * Version Details Vulnerabilities
17 OS Juniper Junos 20.2 R2-s2 * * Version Details Vulnerabilities
18 OS Juniper Junos 20.2 R1 * * Version Details Vulnerabilities
19 OS Juniper Junos 20.2 R2-s3 * * Version Details Vulnerabilities
20 OS Juniper Junos 20.2 R1-s3 * * Version Details Vulnerabilities
21 OS Juniper Junos 20.2 R1-s1 * * Version Details Vulnerabilities
22 OS Juniper Junos 20.3 R1 * * Version Details Vulnerabilities
23 OS Juniper Junos 20.3 R1-s1 * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Juniper Junos 23

- References For CVE-2021-0267

- Metasploit Modules Related To CVE-2021-0267

There are not any metasploit modules related to this CVE entry (Please visit for more information)

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