Riskcovery

CVE-2021-0267

Junos OS: Receipt of a crafted DHCP packet will cause the jdhcpd DHCP service to core.

State
Published
Severity
7.4 High
Published
Apr 22, 2021
Updated
Sep 17, 2024
Reserved
Oct 27, 2020

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.17.4 HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hjuniper

Weaknesses

  • CWE-20 Improper Input Validation

Affected Products

ProductVersions
Junos OSJuniper Networks
  • 19.4 to before 19.4R3-S1Affected
  • 20.1 to before 20.1R2-S1, 20.1R3Affected
  • 20.2 to before 20.2R3Affected
  • 20.3 to before 20.3R2Affected

References

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