Receipt of specially crafted UDP/IP packets over MPLS may be able to bypass a stateless firewall filter. The crafted UDP packets must be encapsulated and meet a very specific packet format to be classified in a way that bypasses IP firewall filter rules. The packets themselves do not cause a service interruption (e.g. RPD crash), but receipt of a high rate of UDP packets may be able to contribute to a denial of service attack. This issue only affects processing of transit UDP/IP packets over MPLS, received on an interface with MPLS enabled. TCP packet processing and non-MPLS encapsulated UDP packet processing are unaffected by this issue. Affected releases are Juniper Networks Junos OS: 12.1X46 versions prior to 12.1X46-D76; 12.3 versions prior to 12.3R12-S10; 12.3X48 versions prior to 12.3X48-D66, 12.3X48-D70; 14.1X53 versions prior to 14.1X53-D47; 15.1 versions prior to 15.1F6-S10, 15.1R4-S9, 15.1R6-S6, 15.1R7; 15.1X49 versions prior to 15.1X49-D131, 15.1X49-D140; 15.1X53 versions prior to 15.1X53-D59 on EX2300/EX3400; 15.1X53 versions prior to 15.1X53-D67 on QFX10K; 15.1X53 versions prior to 15.1X53-D233 on QFX5200/QFX5110; 15.1X53 versions prior to 15.1X53-D471, 15.1X53-D490 on NFX; 16.1 versions prior to 16.1R3-S8, 16.1R4-S9, 16.1R5-S4, 16.1R6-S3, 16.1R7; 16.2 versions prior to 16.2R1-S6, 16.2R2-S5, 16.2R3; 17.1 versions prior to 17.1R1-S7, 17.1R2-S7, 17.1R3; 17.2 versions prior to 17.2R1-S6, 17.2R2-S4, 17.2R3; 17.2X75 versions prior to 17.2X75-D100; 17.3 versions prior to 17.3R1-S4, 17.3R2-S2, 17.3R3; 17.4 versions prior to 17.4R1-S3, 17.4R2; 18.1 versions prior to 18.1R2; 18.2X75 versions prior to 18.2X75-D5.

• http://www.securitytracker.com/id/1041326
• https://kb.juniper.net/JSA10865
• http://www.securitytracker.com/id/1041326
• https://kb.juniper.net/JSA10865

• Juniper » Ex2300 » Version: N/A
  cpe:2.3:h:juniper:ex2300:-
• Juniper » Ex3400 » Version: N/A
  cpe:2.3:h:juniper:ex3400:-
• Juniper » Nfx250 » Version: N/A
  cpe:2.3:h:juniper:nfx250:-
• Juniper » Qfx10000 » Version: N/A
  cpe:2.3:h:juniper:qfx10000:-
• Juniper » Qfx5110 » Version: N/A
  cpe:2.3:h:juniper:qfx5110:-
• Juniper » Qfx5200 » Version: N/A
  cpe:2.3:h:juniper:qfx5200:-
• Juniper » Junos » Version: 12.1x46
  cpe:2.3:o:juniper:junos:12.1x46
• Juniper » Junos » Version: 12.3
  cpe:2.3:o:juniper:junos:12.3
• Juniper » Junos » Version: 12.3x48
  cpe:2.3:o:juniper:junos:12.3x48
• Juniper » Junos » Version: 14.1x53
  cpe:2.3:o:juniper:junos:14.1x53
• Juniper » Junos » Version: 15.1
  cpe:2.3:o:juniper:junos:15.1
• Juniper » Junos » Version: 15.1x49
  cpe:2.3:o:juniper:junos:15.1x49
• Juniper » Junos » Version: 15.1x53
  cpe:2.3:o:juniper:junos:15.1x53
• Juniper » Junos » Version: 16.1
  cpe:2.3:o:juniper:junos:16.1
• Juniper » Junos » Version: 16.2
  cpe:2.3:o:juniper:junos:16.2
• Juniper » Junos » Version: 17.1
  cpe:2.3:o:juniper:junos:17.1
• 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: 18.2x75
  cpe:2.3:o:juniper:junos:18.2x75