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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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 17.3%
CVSS Severity
CVSS v3 Score 7.4
CVSS v2 Score 3.3
Products affected by CVE-2021-0267
  • Juniper » Junos » Version: 19.4
    cpe:2.3:o:juniper:junos:19.4
  • Juniper » Junos » Version: 20.1
    cpe:2.3:o:juniper:junos:20.1
  • Juniper » Junos » Version: 20.2
    cpe:2.3:o:juniper:junos:20.2
  • Juniper » Junos » Version: 20.3
    cpe:2.3:o:juniper:junos:20.3


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