An Incorrect Behavior Order vulnerability in the MAP-E automatic tunneling mechanism of Juniper Networks Junos OS allows an attacker to send certain malformed IPv4 or IPv6 packets to cause a Denial of Service (DoS) to the PFE on the device which is disabled as a result of the processing of these packets. Continued receipt and processing of these malformed IPv4 or IPv6 packets will create a sustained Denial of Service (DoS) condition. This issue only affects MPC 7/8/9/10/11 cards, when MAP-E IP reassembly is enabled on these cards. An indicator of compromise is the output: FPC ["FPC ID" # e.g. "0"] PFE #{PFE ID # e.g. "1"] : Fabric Disabled Example: FPC 0 PFE #1 : Fabric Disabled when using the command: show chassis fabric fpcs An example of a healthy result of the command use would be: user@device-re1> show chassis fabric fpcs Fabric management FPC state: FPC 0 PFE #0 Plane 0: Plane enabled Plane 1: Plane enabled Plane 2: Plane enabled Plane 3: Plane enabled Plane 4: Plane enabled Plane 5: Plane enabled Plane 6: Plane enabled Plane 7: Plane enabled This issue affects: Juniper Networks Junos OS on MX Series with MPC 7/8/9/10/11 cards, when MAP-E IP reassembly is enabled on these cards. 17.2 version 17.2R1 and later versions; 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S12, 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R2-S6, 18.2R3-S3; 18.3 versions prior to 18.3R2-S4, 18.3R3-S1; 18.4 versions prior to 18.4R1-S8, 18.4R2-S5, 18.4R3; 19.1 versions prior to 19.1R1-S6, 19.1R2-S2, 19.1R3; 19.2 versions prior to 19.2R1-S5, 19.2R2; 19.3 versions prior to 19.3R2-S5, 19.3R3. This issue does not affect Juniper Networks Junos OS versions prior to 17.2R1.

• https://kb.juniper.net/JSA11247
• https://www.juniper.net/documentation/en_US/junos/topics/topic-map/map-e-configuring.html
• https://kb.juniper.net/JSA11247
• https://www.juniper.net/documentation/en_US/junos/topics/topic-map/map-e-configuring.html

• Juniper » Mx10000 » Version: N/A
  cpe:2.3:h:juniper:mx10000:-
• Juniper » Mx10003 » Version: N/A
  cpe:2.3:h:juniper:mx10003:-
• Juniper » Mx10008 » Version: N/A
  cpe:2.3:h:juniper:mx10008:-
• Juniper » Mx10016 » Version: N/A
  cpe:2.3:h:juniper:mx10016:-
• Juniper » Mx104 » Version: N/A
  cpe:2.3:h:juniper:mx104:-
• Juniper » Mx10 » Version: N/A
  cpe:2.3:h:juniper:mx10:-
• Juniper » Mx150 » Version: N/A
  cpe:2.3:h:juniper:mx150:-
• Juniper » Mx2008 » Version: N/A
  cpe:2.3:h:juniper:mx2008:-
• Juniper » Mx2010 » Version: N/A
  cpe:2.3:h:juniper:mx2010:-
• Juniper » Mx2020 » Version: N/A
  cpe:2.3:h:juniper:mx2020:-
• Juniper » Mx204 » Version: N/A
  cpe:2.3:h:juniper:mx204:-
• Juniper » Mx240 » Version: N/A
  cpe:2.3:h:juniper:mx240:-
• Juniper » Mx40 » Version: N/A
  cpe:2.3:h:juniper:mx40:-
• Juniper » Mx480 » Version: N/A
  cpe:2.3:h:juniper:mx480:-
• Juniper » Mx5 » Version: N/A
  cpe:2.3:h:juniper:mx5:-
• Juniper » Mx80 » Version: N/A
  cpe:2.3:h:juniper:mx80:-
• Juniper » Mx960 » Version: N/A
  cpe:2.3:h:juniper:mx960:-
• Juniper » Junos » Version: 17.2
  cpe:2.3:o:juniper:junos:17.2
• Juniper » Junos » Version: 17.2x75
  cpe:2.3:o:juniper:junos:17.2x75
• Juniper » Junos » Version: 17.3
  cpe:2.3:o:juniper:junos:17.3
• Juniper » Junos » Version: 17.4
  cpe:2.3:o:juniper:junos:17.4
• Juniper » Junos » Version: 18.1
  cpe:2.3:o:juniper:junos:18.1
• Juniper » Junos » Version: 18.2
  cpe:2.3:o:juniper:junos:18.2
• 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