"value":"\nAn Improper Neutralization of Equivalent Special Elements vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on PTX Series allows a unauthenticated, adjacent attacker to cause a Denial of Service (DoS).\n\nWhen MPLS packets are meant to be sent to a flexible tunnel interface (FTI) and if the FTI tunnel is down, these will hit the reject NH, due to which the packets get sent to the CPU and cause a host path wedge condition. This will cause the FPC to hang and requires a manual restart to recover.\n\nPlease note that this issue specifically affects PTX1000, PTX3000, PTX5000 with FPC3, PTX10002-60C, and PTX10008/16 with LC110x. Other PTX Series devices and Line Cards (LC) are not affected.\n\nThe following log message can be seen when the issue occurs:\n\nCmerror Op Set: Host Loopback: HOST LOOPBACK WEDGE DETECTED IN PATH ID <id> (URI: /fpc/<fpc>/pfe/<pfe>/cm/<cm>/Host_Loopback/<cm>/HOST_LOOPBACK_MAKE_CMERROR_ID[<id>])\nThis issue affects Juniper Networks Junos OS:\n\n\n\n * All versions earlier than 20.4R3-S8;\n * 21.1 versions earlier than 21.1R3-S4;\n * 21.2 versions earlier than 21.2R3-S6;\n * 21.3 versions earlier than 21.3R3-S3;\n * 21.4 versions earlier than 21.4R3-S5;\n * 22.1 versions earlier than 22.1R2-S2, 22.1R3;\n * 22.2 versions earlier than 22.2R2-S1, 22.2R3.\n\n\n\n\n\n\n"
}
]
},
"problemtype":{
"problemtype_data":[
{
"description":[
{
"lang":"eng",
"value":"CWE-76 Improper Neutralization of Equivalent Special Elements",
"value":"<p>To be exposed to this issue FTI need to be configured:</p><code> [ interfaces fti0 unit <unit> tunnel ... ]</code><br/>"
}
],
"value":"To be exposed to this issue FTI need to be configured:\n\n [ interfaces fti0 unit <unit> tunnel ... ]\n"
}
],
"work_around":[
{
"lang":"en",
"supportingMedia":[
{
"base64":false,
"type":"text/html",
"value":"<p>The issue can be prevented by configuring a limit for reject packets via:</p><code> [ system ddos-protection protocols reject aggregate bandwidth 20 ] </code><br/>"
}
],
"value":"The issue can be prevented by configuring a limit for reject packets via:\n\n [ system ddos-protection protocols reject aggregate bandwidth 20 ] \n"
}
],
"exploit":[
{
"lang":"en",
"supportingMedia":[
{
"base64":false,
"type":"text/html",
"value":"<p>Juniper SIRT is not aware of any malicious exploitation of this vulnerability.</p>"
}
],
"value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability.\n\n"
}
],
"solution":[
{
"lang":"en",
"supportingMedia":[
{
"base64":false,
"type":"text/html",
"value":"<p>The following software releases have been updated to resolve this specific issue: Junos OS 20.4R3-S8, 21.1R3-S4, 21.2R3-S6, 21.3R3-S3, 21.4R3-S5, 22.1R2-S2, 22.1R3, 22.2R2-S1, 22.2R3, 22.3R1, and all subsequent releases.</p>"
}
],
"value":"The following software releases have been updated to resolve this specific issue: Junos OS 20.4R3-S8, 21.1R3-S4, 21.2R3-S6, 21.3R3-S3, 21.4R3-S5, 22.1R2-S2, 22.1R3, 22.2R2-S1, 22.2R3, 22.3R1, and all subsequent releases.\n\n"
