Vulnerability Database

346,508

Total vulnerabilities in the database

CVE-2022-22176 — juniper / junos

Improper Input Validation

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.

  • Published: Jan 19, 2022
  • Updated: Nov 16, 2025
  • CVE: CVE-2022-22176
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 7.4
  • AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

CVSS v2:

  • Severity: Low
  • Score: 2.9
  • AV:A/AC:M/Au:N/C:N/I:N/A:P
Software From Fixed in
juniper / junos 14.1x53-d30 14.1x53-d30.x
juniper / junos 14.1-r1 14.1-r1.x
juniper / junos 13.3-r7 13.3-r7.x
juniper / junos 13.2-r8 13.2-r8.x
juniper / junos 14.1-r4 14.1-r4.x
juniper / junos 14.2-r1 14.2-r1.x
juniper / junos 13.3-r4 13.3-r4.x
juniper / junos 14.2-r2 14.2-r2.x
juniper / junos 14.1-r3 14.1-r3.x
juniper / junos 13.3-r5 13.3-r5.x
juniper / junos 15.1-r7 15.1-r7.x
juniper / junos 14.1x53-d35 14.1x53-d35.x
juniper / junos 13.2x52-d25 13.2x52-d25.x
juniper / junos 13.3-r1 13.3-r1.x
juniper / junos 15.1-f1 15.1-f1.x
juniper / junos 14.1x53-d45 14.1x53-d45.x
juniper / junos 13.2x51-d26 13.2x51-d26.x
juniper / junos 15.1-f6-s4 15.1-f6-s4.x
juniper / junos 14.1x53-d15 14.1x53-d15.x
juniper / junos 15.1-f2-s3 15.1-f2-s3.x
juniper / junos 13.3-r8 13.3-r8.x
juniper / junos 13.2-r7-s1 13.2-r7-s1.x
juniper / junos 15.1-f7 15.1-f7.x
juniper / junos 13.2x51-d20 13.2x51-d20.x
juniper / junos 13.2x51-d35 13.2x51-d35.x
juniper / junos 14.1x53-d10 14.1x53-d10.x
juniper / junos 14.1-r8 14.1-r8.x
juniper / junos 14.2-r3 14.2-r3.x
juniper / junos 14.1x53-d40 14.1x53-d40.x
juniper / junos 13.2x51-d21 13.2x51-d21.x
juniper / junos 15.1-r3 15.1-r3.x
juniper / junos 14.2-r6 14.2-r6.x
juniper / junos 15.1-r 15.1-r.x
juniper / junos 14.1x53-d42 14.1x53-d42.x
juniper / junos 15.1-f2-s2 15.1-f2-s2.x
juniper / junos 14.2-r7-s7 14.2-r7-s7.x
juniper / junos 14.1x53-r1 14.1x53-r1.x
juniper / junos 15.1-r6 15.1-r6.x
juniper / junos 15.1-f4 15.1-f4.x
juniper / junos 15.1-r4 15.1-r4.x
juniper / junos 15.1-f2-s4 15.1-f2-s4.x
juniper / junos 14.1x53-d25 14.1x53-d25.x
juniper / junos 15.1-f5-s7 15.1-f5-s7.x
juniper / junos 15.1-f6-s7 15.1-f6-s7.x
juniper / junos 15.1-f6 15.1-f6.x
juniper / junos 13.2-r4 13.2-r4.x
juniper / junos 13.2-r7-s2 13.2-r7-s2.x
juniper / junos 13.2x52-d10 13.2x52-d10.x
juniper / junos 13.3-r2-s2 13.3-r2-s2.x
juniper / junos 15.1-f2 15.1-f2.x
juniper / junos 14.1x53-d27 14.1x53-d27.x
juniper / junos 15.1-a1 15.1-a1.x
juniper / junos 14.1-r9 14.1-r9.x
juniper / junos 14.1x50 14.1x50.x
juniper / junos 13.2x52-d15 13.2x52-d15.x
juniper / junos 13.2-r7 13.2-r7.x
juniper / junos 13.2-r3 13.2-r3.x
juniper / junos 15.1-f3 15.1-f3.x
juniper / junos 15.1-r2 15.1-r2.x
juniper / junos 14.1x53-d16 14.1x53-d16.x
juniper / junos 14.2-r 14.2-r.x
juniper / junos 15.1-r4-s7 15.1-r4-s7.x
juniper / junos 14.2-r8 14.2-r8.x
juniper / junos 15.1-r4-s8 15.1-r4-s8.x
juniper / junos 14.1-r7 14.1-r7.x
juniper / junos 14.1-r6 14.1-r6.x
juniper / junos 15.1-r5-s5 15.1-r5-s5.x
juniper / junos 14.1x53-d26 14.1x53-d26.x
juniper / junos 13.2-r6 13.2-r6.x
juniper / junos 14.2-r7 14.2-r7.x
juniper / junos 13.2-r5 13.2-r5.x
juniper / junos 14.2-r4 14.2-r4.x
juniper / junos 14.1x53-d43 14.1x53-d43.x
juniper / junos 15.1-r6-s1 15.1-r6-s1.x
juniper / junos 13.3-r9 13.3-r9.x
juniper / junos 13.2-r2 13.2-r2.x
juniper / junos 14.1x53-d38 14.1x53-d38.x
juniper / junos 13.3-r6 13.3-r6.x
juniper / junos 14.1x53-d44 14.1x53-d44.x
juniper / junos 15.1-r5 15.1-r5.x
juniper / junos 14.1x53-d121 14.1x53-d121.x
juniper / junos 13.2x52-d5 13.2x52-d5.x
juniper / junos 15.1-r1 15.1-r1.x
juniper / junos 13.3-r2 13.3-r2.x
juniper / junos 14.1-r2 14.1-r2.x
juniper / junos 14.1x55-d30 14.1x55-d30.x
juniper / junos 15.1-f2-s1 15.1-f2-s1.x
juniper / junos 15.1-r5-s1 15.1-r5-s1.x
juniper / junos 15.1-f5 15.1-f5.x
juniper / junos 14.1x55-d35 14.1x55-d35.x
juniper / junos 14.1-r8-s3 14.1-r8-s3.x
juniper / junos 14.2-r5 14.2-r5.x
juniper / junos 14.2-r7-s6 14.2-r7-s6.x
juniper / junos 13.2x51-d15 13.2x51-d15.x
juniper / junos 13.2x51-d30 13.2x51-d30.x
juniper / junos 13.3-r3 13.3-r3.x
juniper / junos 14.1-r5 14.1-r5.x
juniper / junos 13.2-r1 13.2-r1.x
juniper / junos 14.1x51-d60 14.1x51-d60.x
juniper / junos 13.2x51-d25 13.2x51-d25.x
juniper / junos 13.2x52-d20 13.2x52-d20.x
juniper / junos 14.1x53-d50 14.1x53-d50.x
juniper / junos 13.3-r4-s11 13.3-r4-s11.x
juniper / junos 15.1-f6-s8 15.1-f6-s8.x
juniper / junos 15.1-r5-s3 15.1-r5-s3.x
juniper / junos 14.2-r7-s8 14.2-r7-s8.x
juniper / junos 15.1-r5-s6 15.1-r5-s6.x
juniper / junos 15.1-r6-s2 15.1-r6-s2.x
juniper / junos 13.3-r10 13.3-r10.x
juniper / junos 14.1x50-d60 14.1x50-d60.x
juniper / junos 14.1x53-d107 14.1x53-d107.x
juniper / junos 15.1-r6-s3 15.1-r6-s3.x
juniper / junos 14.1x53-d34 14.1x53-d34.x
juniper / junos 15.1-r6-s4 15.1-r6-s4.x
juniper / junos 15.1-f6-s9 15.1-f6-s9.x
juniper / junos 14.1x53-d46 14.1x53-d46.x
juniper / junos 15.1-r4-s9 15.1-r4-s9.x
juniper / junos 15.1-r6-s6 15.1-r6-s6.x
juniper / junos 15.1-f 15.1-f.x
juniper / junos 15.1-f6-s3 15.1-f6-s3.x
juniper / junos 14.1x53-d20 14.1x53-d20.x
juniper / junos 14.1x53-d47 14.1x53-d47.x
juniper / junos 14.1x53-d48 14.1x53-d48.x
juniper / junos 15.1-r7-s1 15.1-r7-s1.x
juniper / junos 15.1-f6-s10 15.1-f6-s10.x
juniper / junos 15.1-r7-s2 15.1-r7-s2.x
juniper / junos 15.1-r7-s3 15.1-r7-s3.x
juniper / junos 18.3-r1-s1 18.3-r1-s1.x
juniper / junos 18.3-r2 18.3-r2.x
juniper / junos 18.3-r1 18.3-r1.x
juniper / junos 15.1-f6-s2 15.1-f6-s2.x
juniper / junos 15.1-f6-s1 15.1-f6-s1.x
juniper / junos 15.1-f6-s5 15.1-f6-s5.x
juniper / junos 15.1-f6-s6 15.1-f6-s6.x
juniper / junos 18.4-r1 18.4-r1.x
juniper / junos 15.1 15.1.x
juniper / junos 14.1x53 14.1x53.x
juniper / junos 18.3-r1-s2 18.3-r1-s2.x
juniper / junos 18.3 18.3.x
juniper / junos 18.4 18.4.x
juniper / junos 13.2x51 13.2x51.x
juniper / junos 13.3 13.3.x
juniper / junos 14.1 14.1.x
juniper / junos 14.2 14.2.x
juniper / junos 14.1x55 14.1x55.x
juniper / junos 14.1x55-d20 14.1x55-d20.x
juniper / junos 14.1x55-d25 14.1x55-d25.x
juniper / junos 14.1x55-d16 14.1x55-d16.x
juniper / junos 18.4-r1-s1 18.4-r1-s1.x
juniper / junos 18.3-r1-s3 18.3-r1-s3.x
juniper / junos 14.1x53-d49 14.1x53-d49.x
juniper / junos 18.3-r1-s4 18.3-r1-s4.x
juniper / junos 18.4-r1-s3 18.4-r1-s3.x
juniper / junos 18.4-r1-s4 18.4-r1-s4.x
juniper / junos 18.4-r1-s2 18.4-r1-s2.x
juniper / junos 19.1-r1 19.1-r1.x
juniper / junos 19.1 19.1.x
juniper / junos 19.2-r1 19.2-r1.x
juniper / junos 18.4-r2 18.4-r2.x
juniper / junos 19.1-r1-s1 19.1-r1-s1.x
juniper / junos 19.1-r1-s3 19.1-r1-s3.x
juniper / junos 19.1-r1-s2 19.1-r1-s2.x
juniper / junos 15.1-r7-s4 15.1-r7-s4.x
juniper / junos 15.1-r7-s5 15.1-r7-s5.x
juniper / junos 18.4-r1-s5 18.4-r1-s5.x
juniper / junos 15.1-f6-s12 15.1-f6-s12.x
juniper / junos 19.2-r1-s1 19.2-r1-s1.x
juniper / junos 19.2-r1-s2 19.2-r1-s2.x
juniper / junos 18.3-r1-s5 18.3-r1-s5.x
juniper / junos 13.2x52 13.2x52.x
juniper / junos 14.1x53-d51 14.1x53-d51.x
juniper / junos 18.3-r2-s1 18.3-r2-s1.x
juniper / junos 18.3-r2-s2 18.3-r2-s2.x
juniper / junos 18.4-r2-s1 18.4-r2-s1.x
juniper / junos 13.2x51-d20.2 13.2x51-d20.2.x
juniper / junos 19.3 19.3.x
juniper / junos 19.3-r1 19.3-r1.x
juniper / junos 19.2 19.2.x
juniper / junos 18.4-r2-s2 18.4-r2-s2.x
juniper / junos 18.3-r1-s6 18.3-r1-s6.x
juniper / junos 14.1x53-d52 14.1x53-d52.x
juniper / junos 19.2-r1-s3 19.2-r1-s3.x
juniper / junos 18.3-r3 18.3-r3.x
juniper / junos 19.4-r1 19.4-r1.x
juniper / junos 19.3-r2 19.3-r2.x
juniper / junos 19.1-r2 19.1-r2.x
juniper / junos 18.4-r3 18.4-r3.x
juniper / junos 18.4-r2-s3 18.4-r2-s3.x
juniper / junos 18.3-r3-s1 18.3-r3-s1.x
juniper / junos 19.3-r2-s1 19.3-r2-s1.x
juniper / junos 19.3-r1-s1 19.3-r1-s1.x
juniper / junos 19.2-r1-s4 19.2-r1-s4.x
juniper / junos 20.1-r1 20.1-r1.x
juniper / junos 19.4-r1-s1 19.4-r1-s1.x
juniper / junos 19.3-r2-s2 19.3-r2-s2.x
juniper / junos 19.1-r1-s4 19.1-r1-s4.x
juniper / junos 18.4-r1-s6 18.4-r1-s6.x
juniper / junos 18.3-r2-s3 18.3-r2-s3.x
juniper / junos 15.1-r7-s7 15.1-r7-s7.x
juniper / junos 14.1x53-d53 14.1x53-d53.x
juniper / junos 18.4-r3-s2 18.4-r3-s2.x
juniper / junos 18.4-r3-s1 18.4-r3-s1.x
juniper / junos 18.4-r2-s4 18.4-r2-s4.x
juniper / junos 19.1-r2-s1 19.1-r2-s1.x
juniper / junos 19.1-r3 19.1-r3.x
juniper / junos 19.1-r3-s1 19.1-r3-s1.x
juniper / junos 15.1-r7-s6 15.1-r7-s6.x
juniper / junos 19.4-r1-s2 19.4-r1-s2.x
juniper / junos 20.1-r1-s1 20.1-r1-s1.x
juniper / junos 20.2-r1 20.2-r1.x
juniper / junos 20.1-r1-s2 20.1-r1-s2.x
juniper / junos 20.1-r1-s3 20.1-r1-s3.x
juniper / junos 19.4-r2 19.4-r2.x
juniper / junos 19.4-r2-s1 19.4-r2-s1.x
juniper / junos 19.3-r2-s3 19.3-r2-s3.x
juniper / junos 19.1-r3-s2 19.1-r3-s2.x
juniper / junos 18.4-r3-s3 18.4-r3-s3.x
juniper / junos 18.4-r3-s4 18.4-r3-s4.x
juniper / junos 18.3-r3-s2 18.3-r3-s2.x
juniper / junos 18.3-r2-s4 18.3-r2-s4.x
juniper / junos 19.3-r2-s4 19.3-r2-s4.x
juniper / junos 18.3-r3-s3 18.3-r3-s3.x
juniper / junos 20.2-r1-s1 20.2-r1-s1.x
juniper / junos 20.2-r1-s2 20.2-r1-s2.x
juniper / junos 19.4-r2-s2 19.4-r2-s2.x
juniper / junos 19.2-r3 19.2-r3.x
juniper / junos 18.4-r3-s5 18.4-r3-s5.x
juniper / junos 19.4-r3 19.4-r3.x
juniper / junos 19.3-r2-s5 19.3-r2-s5.x
juniper / junos 19.3-r3 19.3-r3.x
juniper / junos 19.2-r1-s5 19.2-r1-s5.x
juniper / junos 19.1-r3-s3 19.1-r3-s3.x
juniper / junos 18.4-r2-s5 18.4-r2-s5.x
juniper / junos 18.4-r2-s6 18.4-r2-s6.x
juniper / junos 15.1-r7-s8 15.1-r7-s8.x
juniper / junos 19.1-r1-s5 19.1-r1-s5.x
juniper / junos 18.4-r1-s7 18.4-r1-s7.x
juniper / junos 20.3-r1 20.3-r1.x
juniper / junos 20.1-r1-s4 20.1-r1-s4.x
juniper / junos 19.1-r3-s4 19.1-r3-s4.x
juniper / junos 18.4-r3-s6 18.4-r3-s6.x
juniper / junos 18.3-r3-s4 18.3-r3-s4.x
juniper / junos 20.3-r1-s1 20.3-r1-s1.x
juniper / junos 20.2-r1-s3 20.2-r1-s3.x
juniper / junos 19.2-r3-s1 19.2-r3-s1.x
juniper / junos 18.4-r3-s7 18.4-r3-s7.x
juniper / junos 19.4-r3-s1 19.4-r3-s1.x
juniper / junos 19.4-r2-s3 19.4-r2-s3.x
juniper / junos 20.2-r2 20.2-r2.x
juniper / junos 20.2-r2-s1 20.2-r2-s1.x
juniper / junos 19.4-r1-s3 19.4-r1-s3.x
juniper / junos 19.2-r1-s6 19.2-r1-s6.x
juniper / junos 19.1-r2-s2 19.1-r2-s2.x
juniper / junos 20.4-r1 20.4-r1.x
juniper / junos 20.2-r2-s2 20.2-r2-s2.x
juniper / junos 20.1-r2 20.1-r2.x
juniper / junos 20.1-r2-s1 20.1-r2-s1.x
juniper / junos 20.4-r1-s1 20.4-r1-s1.x
juniper / junos 19.1-r1-s6 19.1-r1-s6.x
juniper / junos 20.2-r2-s3 20.2-r2-s3.x
juniper / junos 20.3-r2 20.3-r2.x
juniper / junos 19.3-r3-s1 19.3-r3-s1.x
juniper / junos 18.4-r2-s7 18.4-r2-s7.x
juniper / junos 21.1-r1 21.1-r1.x
juniper / junos 20.4-r2 20.4-r2.x
juniper / junos 20.3-r2-s1 20.3-r2-s1.x
juniper / junos 20.2-r3 20.2-r3.x
juniper / junos 20.2-r3-s1 20.2-r3-s1.x
juniper / junos 20.1-r3 20.1-r3.x
juniper / junos 19.4-r3-s2 19.4-r3-s2.x
juniper / junos 19.4-r3-s3 19.4-r3-s3.x
juniper / junos 19.4-r3-s4 19.4-r3-s4.x
juniper / junos 19.3-r3-s2 19.3-r3-s2.x
juniper / junos 19.2-r3-s2 19.2-r3-s2.x
juniper / junos 18.4-r2-s8 18.4-r2-s8.x
juniper / junos 20.1-r2-s2 20.1-r2-s2.x
juniper / junos 21.2-r1 21.2-r1.x
juniper / junos 19.1-r3-s5 19.1-r3-s5.x
juniper / junos 18.4-r3-s8 18.4-r3-s8.x
juniper / junos 20.4-r2-s1 20.4-r2-s1.x
juniper / junos 21.1-r1-s1 21.1-r1-s1.x
juniper / junos 20.3-r3 20.3-r3.x
juniper / junos 15.1-r7-s9 15.1-r7-s9.x
juniper / junos 19.4-r2-s4 19.4-r2-s4.x
juniper / junos 19.4-r3-s5 19.4-r3-s5.x
juniper / junos 19.4-r1-s4 19.4-r1-s4.x
juniper / junos 19.1-r3-s6 19.1-r3-s6.x
juniper / junos 19.4-r2-s5 19.4-r2-s5.x
juniper / junos 18.4-r3-s9 18.4-r3-s9.x
juniper / junos 18.3-r3-s5 18.3-r3-s5.x
juniper / junos 15.1-r7-s10 15.1-r7-s10.x
juniper / junos 20.2-r3-s2 20.2-r3-s2.x
juniper / junos 20.1-r3-s1 20.1-r3-s1.x
juniper / junos 19.3-r3-s3 19.3-r3-s3.x
juniper / junos 19.2-r3-s3 19.2-r3-s3.x
juniper / junos 21.1-r2 21.1-r2.x
juniper / junos 19.3-r2-s6 19.3-r2-s6.x
juniper / junos 18.3-r 18.3-r.x
juniper / junos 19.2-r1-s7 19.2-r1-s7.x
juniper / junos 19.4 19.4.x
juniper / junos 20.1-r3-s2 20.1-r3-s2.x
juniper / junos 20.4-r2-s2 20.4-r2-s2.x
juniper / junos 21.2 21.2.x
juniper / junos 21.1 21.1.x
juniper / junos 20.4 20.4.x
juniper / junos 20.3 20.3.x
juniper / junos 20.2 20.2.x
juniper / junos 20.1 20.1.x
juniper / junos 13.3r9 13.3r9.x
juniper / junos 14.1r7 14.1r7.x
juniper / junos 14.1x51 14.1x51.x
juniper / junos 14.1x53-d54 14.1x53-d54.x
juniper / junos 14.2r6 14.2r6.x

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.