CVE-2022-22176

Junos OS: In a scenario with dhcp-security and option-82 configured jdhcpd crashes upon receipt of a malformed DHCP packet

MEDIUM

6.5

CVSS Score

Published: January 19, 2022 at 12:21 AM UTC

Updated: June 17, 2026 at 04:27 AM UTC

1 product affected across 1 vendorJunos

Using Junos OS by Juniper Networks?

Get instant alerts when new vulnerabilities affect Junos OS - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

MEDIUM6.5

Exploit prediction

EPSS 0.4%

Description

An Improper Validation of Syntactic Correctness of Input vulnerability in the Juniper DHCP daemon (jdhcpd) of Juniper Networks Junos OS allows an adjacent unauthenticated attacker sending a malformed DHCP packet to cause a crash of jdhcpd and thereby a Denial of Service (DoS). If option-82 is configured in a DHCP snooping / -security scenario, jdhcpd crashes if a specific malformed DHCP request packet is received. The DHCP functionality is impacted while jdhcpd restarts, and continued exploitation of the vulnerability will lead to the unavailability of the DHCP service and thereby a sustained DoS. This issue affects Juniper Networks Junos OS 13.2 version 13.2R1 and later versions prior to 15.1R7-S11; 18.3 versions prior to 18.3R3-S6; 18.4 versions prior to 18.4R2-S9, 18.4R3-S10; 19.1 versions prior to 19.1R2-S3, 19.1R3-S7; 19.2 versions prior to 19.2R1-S8, 19.2R3-S4; 19.3 versions prior to 19.3R2-S7, 19.3R3-S4; 19.4 versions prior to 19.4R3-S6; 20.1 versions prior to 20.1R3-S3; 20.2 versions prior to 20.2R3-S3; 20.3 versions prior to 20.3R3-S1; 20.4 versions prior to 20.4R3; 21.1 versions prior to 21.1R2-S1, 21.1R3; 21.2 versions prior to 21.2R1-S1, 21.2R2. This issue does not affect Juniper Networks Junos OS version 12.3R12 and prior versions.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Junos · Juniper Networks

95%

v < 15.1R7-S1113.2R1 ≤ v < 13.2*18.3 ≤ v < 18.3R3-S618.4 ≤ v < 18.4R2-S9, 18.4R3-S1019.1 ≤ v < 19.1R2-S3, 19.1R3-S719.2 ≤ v < 19.2R1-S8, 19.2R3-S419.3 ≤ v < 19.3R2-S7, 19.3R3-S419.4 ≤ v < 19.4R3-S620.1 ≤ v < 20.1R3-S320.2 ≤ v < 20.2R3-S320.3 ≤ v < 20.3R3-S120.4 ≤ v < 20.4R321.1 ≤ v < 21.1R2-S1, 21.1R321.2 ≤ v < 21.2R1-S1, 21.2R213.2 r1 13.2 r2 13.2 r3 13.2 r4 13.2 r5 13.2 r6 13.2 r7 13.2 r7-s1 13.2 r7-s2 13.2 r8 13.2R1 13.2x51 13.2x51 d15 13.2x51 d20 13.2x51 d20.2 13.2x51 d21 13.2x51 d25 13.2x51 d26 13.2x51 d30 13.2x51 d35 13.2x52 13.2x52 d10 13.2x52 d15 13.2x52 d20 13.2x52 d25 13.2x52 d5 13.3 13.3 r1 13.3 r10 13.3 r2 13.3 r2-s2 13.3 r3 13.3 r4 13.3 r4-s11 13.3 r5 13.3 r6 13.3 r7 13.3 r8 13.3 r9 13.3r9 14.1 14.1 r1 14.1 r2 14.1 r3 14.1 r4 14.1 r5 14.1 r6 14.1 r7 14.1 r8 14.1 r8-s3 14.1 r9 14.1r714.1x5014.1x50 d60 14.1x51 14.1x51 d6014.1x5314.1x53 d10 14.1x53 d107 14.1x53 d121 14.1x53 d15 14.1x53 d16 14.1x53 d20 14.1x53 d25 14.1x53 d26 14.1x53 d27 14.1x53 d30 14.1x53 d34 14.1x53 d35 14.1x53 d38 14.1x53 d40 14.1x53 d42 14.1x53 d43 14.1x53 d44 14.1x53 d45 14.1x53 d4614.1x53 d4714.1x53 d48 14.1x53 d49 14.1x53 d50 14.1x53 d51 14.1x53 d52 14.1x53 d53 14.1x53 d54 14.1x53 r114.1x53-d1014.1x53-d1514.1x53-d2514.1x53-d2614.1x53-d2714.1x53-d3014.1x53-d3514.1x55 14.1x55 d16 14.1x55 d20 14.1x55 d25 14.1x55 d30 14.1x55 d35 14.2 14.2 r 14.2 r1 14.2 r2 14.2 r3 14.2 r4 14.2 r5 14.2 r6 14.2 r7 14.2 r7-s6 14.2 r7-s7 14.2 r7-s8 14.2 r8 14.2r6 15.1 15.1 a1 15.1 f 15.1 f1 15.1 f2 15.1 f2-s1 15.1 f2-s2 15.1 f2-s3 15.1 f2-s4 15.1 f3 15.1 f4 15.1 f5 15.1 f5-s7 15.1 f6 15.1 f6-s1 15.1 f6-s10 15.1 f6-s12 15.1 f6-s2 15.1 f6-s3 15.1 f6-s4 15.1 f6-s5 15.1 f6-s6 15.1 f6-s7 15.1 f6-s8 15.1 f6-s9 15.1 f7 15.1 r 15.1 r1 15.1 r2 15.1 r3 15.1 r4 15.1 r4-s7 15.1 r4-s8 15.1 r4-s9 15.1 r5 15.1 r5-s1 15.1 r5-s3 15.1 r5-s5 15.1 r5-s6 15.1 r6 15.1 r6-s1 15.1 r6-s2 15.1 r6-s3 15.1 r6-s4 15.1 r6-s6 15.1 r7 15.1 r7-s1 15.1 r7-s10 15.1 r7-s2 15.1 r7-s3 15.1 r7-s4 15.1 r7-s5 15.1 r7-s6 15.1 r7-s7 15.1 r7-s8 15.1 r7-s9 18.3 18.3 r 18.3 r1 18.3 r1-s1 18.3 r1-s2 18.3 r1-s3 18.3 r1-s4 18.3 r1-s5 18.3 r1-s6 18.3 r2 18.3 r2-s1 18.3 r2-s2 18.3 r2-s3 18.3 r2-s4 18.3 r3 18.3 r3-s1 18.3 r3-s2 18.3 r3-s3 18.3 r3-s4 18.3 r3-s5 18.4 18.4 r1 18.4 r1-s1 18.4 r1-s2 18.4 r1-s3 18.4 r1-s4 18.4 r1-s5 18.4 r1-s6 18.4 r1-s7 18.4 r2 18.4 r2-s1 18.4 r2-s2 18.4 r2-s3 18.4 r2-s4 18.4 r2-s5 18.4 r2-s6 18.4 r2-s7 18.4 r2-s8 18.4 r3 18.4 r3-s1 18.4 r3-s2 18.4 r3-s3 18.4 r3-s4 18.4 r3-s5 18.4 r3-s6 18.4 r3-s7 18.4 r3-s8 18.4 r3-s9 19.1 19.1 r1 19.1 r1-s1 19.1 r1-s2 19.1 r1-s3 19.1 r1-s4 19.1 r1-s5 19.1 r1-s6 19.1 r2 19.1 r2-s1 19.1 r2-s2 19.1 r3 19.1 r3-s1 19.1 r3-s2 19.1 r3-s3 19.1 r3-s4 19.1 r3-s5 19.1 r3-s6 19.2 19.2 r1 19.2 r1-s1 19.2 r1-s2 19.2 r1-s3 19.2 r1-s4 19.2 r1-s5 19.2 r1-s6 19.2 r1-s7 19.2 r3 19.2 r3-s1 19.2 r3-s2 19.2 r3-s3 19.3 19.3 r1 19.3 r1-s1 19.3 r2 19.3 r2-s1 19.3 r2-s2 19.3 r2-s3 19.3 r2-s4 19.3 r2-s5 19.3 r2-s6 19.3 r3 19.3 r3-s1 19.3 r3-s2 19.3 r3-s3 19.4 19.4 r1 19.4 r1-s1 19.4 r1-s2 19.4 r1-s3 19.4 r1-s4 19.4 r2 19.4 r2-s1 19.4 r2-s2 19.4 r2-s3 19.4 r2-s4 19.4 r2-s5 19.4 r3 19.4 r3-s1 19.4 r3-s2 19.4 r3-s3 19.4 r3-s4 19.4 r3-s5 20.1 20.1 r1 20.1 r1-s1 20.1 r1-s2 20.1 r1-s3 20.1 r1-s4 20.1 r2 20.1 r2-s1 20.1 r2-s2 20.1 r3 20.1 r3-s1 20.1 r3-s2 20.2 20.2 r1 20.2 r1-s1 20.2 r1-s2 20.2 r1-s3 20.2 r2 20.2 r2-s1 20.2 r2-s2 20.2 r2-s3 20.2 r3 20.2 r3-s1 20.2 r3-s2 20.3 20.3 r1 20.3 r1-s1 20.3 r2 20.3 r2-s1 20.3 r3 20.4 20.4 r1 20.4 r1-s1 20.4 r2 20.4 r2-s1 20.4 r2-s2 21.1 21.1 r1 21.1 r1-s1 21.1 r2 21.2 21.2 r1

Vendor states this is fixed in 12.3R12 (unaffected)

Affected range stops below 13.2*, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.1R7-S11, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.3R3-S6, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.4R2-S9, 18.4R3-S10, so it looks safe — our inference, not a vendor statement

Affected range stops below 19.1R2-S3, 19.1R3-S7, so it looks safe — our inference, not a vendor statement

Affected range stops below 19.2R1-S8, 19.2R3-S4, so it looks safe — our inference, not a vendor statement

Affected range stops below 19.3R2-S7, 19.3R3-S4, so it looks safe — our inference, not a vendor statement

Affected range stops below 19.4R3-S6, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.1R3-S3, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.2R3-S3, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.3R3-S1, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.4R3, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.1R2-S1, 21.1R3, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.2R1-S1, 21.2R2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://kb.juniper.net/JSA11282

References (1)

x_refsource_CONFIRMVendor Advisory

Source: [email protected]

https://kb.juniper.net/JSA11282

CVSS

6.5MEDIUM[email protected]

Attack Vector: ADJACENT_NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-1286CWE-20

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create account Sign in

Free plan, no card