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.

• https://kb.juniper.net/JSA11282
• https://kb.juniper.net/JSA11282

• Juniper » Junos » Version: 13.2
  cpe:2.3:o:juniper:junos:13.2
• Juniper » Junos » Version: 13.2x51
  cpe:2.3:o:juniper:junos:13.2x51
• Juniper » Junos » Version: 13.2x52
  cpe:2.3:o:juniper:junos:13.2x52
• Juniper » Junos » Version: 13.3
  cpe:2.3:o:juniper:junos:13.3
• Juniper » Junos » Version: 13.3r9
  cpe:2.3:o:juniper:junos:13.3r9
• Juniper » Junos » Version: 14.1
  cpe:2.3:o:juniper:junos:14.1
• Juniper » Junos » Version: 14.1r7
  cpe:2.3:o:juniper:junos:14.1r7
• Juniper » Junos » Version: 14.1x50
  cpe:2.3:o:juniper:junos:14.1x50
• Juniper » Junos » Version: 14.1x51
  cpe:2.3:o:juniper:junos:14.1x51
• Juniper » Junos » Version: 14.1x53
  cpe:2.3:o:juniper:junos:14.1x53
• Juniper » Junos » Version: 14.1x53-d10
  cpe:2.3:o:juniper:junos:14.1x53-d10
• Juniper » Junos » Version: 14.1x53-d15
  cpe:2.3:o:juniper:junos:14.1x53-d15
• Juniper » Junos » Version: 14.1x53-d25
  cpe:2.3:o:juniper:junos:14.1x53-d25
• Juniper » Junos » Version: 14.1x53-d26
  cpe:2.3:o:juniper:junos:14.1x53-d26
• Juniper » Junos » Version: 14.1x53-d27
  cpe:2.3:o:juniper:junos:14.1x53-d27
• Juniper » Junos » Version: 14.1x53-d30
  cpe:2.3:o:juniper:junos:14.1x53-d30
• Juniper » Junos » Version: 14.1x53-d35
  cpe:2.3:o:juniper:junos:14.1x53-d35
• Juniper » Junos » Version: 14.1x55
  cpe:2.3:o:juniper:junos:14.1x55
• Juniper » Junos » Version: 14.2
  cpe:2.3:o:juniper:junos:14.2
• Juniper » Junos » Version: 14.2r6
  cpe:2.3:o:juniper:junos:14.2r6
• Juniper » Junos » Version: 15.1
  cpe:2.3:o:juniper:junos:15.1
• Juniper » Junos » Version: 18.3
  cpe:2.3:o:juniper:junos:18.3
• Juniper » Junos » Version: 18.4
  cpe:2.3:o:juniper:junos:18.4
• Juniper » Junos » Version: 19.1
  cpe:2.3:o:juniper:junos:19.1
• Juniper » Junos » Version: 19.2
  cpe:2.3:o:juniper:junos:19.2
• Juniper » Junos » Version: 19.3
  cpe:2.3:o:juniper:junos:19.3
• 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
• Juniper » Junos » Version: 20.4
  cpe:2.3:o:juniper:junos:20.4
• Juniper » Junos » Version: 21.1
  cpe:2.3:o:juniper:junos:21.1
• Juniper » Junos » Version: 21.2
  cpe:2.3:o:juniper:junos:21.2