What is CVE-2022-22179?

CVE-2022-22179 is a medium-severity vulnerability in Juniper Junos, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2022-01-19.

How severe is CVE-2022-22179?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Improper input validation in Juniper Junos

CVE-2022-22179

A Improper Validation of Specified Index, Position, or Offset in Input vulnerability in the Juniper DHCP daemon (jdhcpd) of Juniper Networks Junos OS allows an adjacent unauthenticated attacker to cause a crash of jdhcpd and thereby a Denial of Service (DoS). In a scenario where DHCP relay or local server is configured the problem can be triggered if a DHCPv4 packet with specific options is received leading to a corruption of the options read from the packet. This corruption can then lead to jdhcpd crash and restart. This issue affects: Juniper Networks Junos OS 17.4R1 and later versions prior to 18.4R3-S10; 19.1 versions prior to 19.1R3-S7; 19.2 versions prior to 19.2R1-S8, 19.2R3-S4; 19.3 versions prior to 19.3R3-S4; 19.4 versions prior to 19.4R3-S6; 20.1 versions prior to 20.1R3-S2; 20.2 versions prior to 20.2R3-S3; 20.3 versions prior to 20.3R3-S2; 20.4 versions prior to 20.4R3-S1; 21.1 versions prior to 21.1R2-S2, 21.1R3; 21.2 versions prior to 21.2R1-S2, 21.2R2, 21.2R3; 21.3 versions prior to 21.3R1-S1, 21.3R2.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2022-01-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (28.8th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 28.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Juniper Junos — versions 17.4, 18.1, 18.2
Juniper Networks Junos OS — versions 17.4R1, 18.4, 19.1

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

kb.juniper.net/JSA11285 (Vendor Advisory)

Frequently asked questions

What is CVE-2022-22179?: CVE-2022-22179 is a medium-severity vulnerability in Juniper Junos, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2022-01-19.
How severe is CVE-2022-22179?: Medium severity. CVSS v3 base score is 6.5 out of 10.