In an MPLS P2MP environment a Loop with Unreachable Exit Condition vulnerability in the routing protocol daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker to cause high load on RPD which in turn may lead to routing protocol flaps. If a system with sensor-based-stats enabled receives a specific LDP FEC this can lead to the above condition. Continued receipted of such an LDP FEC will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS 19.2 version 19.2R2 and later versions prior to 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R1-S4, 19.4R2-S4, 19.4R3-S2; 20.1 versions prior to 20.1R2-S1, 20.1R3; 20.2 versions prior to 20.2R2-S1, 20.2R3; 20.3 versions prior to 20.3R1-S2, 20.3R2. This issue does not affect Juniper Networks Junos OS versions prior to 19.2R2. Juniper Networks Junos OS Evolved All versions prior to 20.1R2-S3-EVO; 20.3 versions prior to 20.3R1-S2-EVO.
Metrics
Affected Vendors & Products
References
Link | Providers |
---|---|
https://kb.juniper.net/JSA11225 |
History
No history.
MITRE
Status: PUBLISHED
Assigner: juniper
Published: 2021-10-19T18:16:50.581451Z
Updated: 2024-09-16T16:23:31.512Z
Reserved: 2021-04-15T00:00:00
Link: CVE-2021-31363
Vulnrichment
No data.
NVD
Status : Modified
Published: 2021-10-19T19:15:09.310
Modified: 2024-11-21T06:05:30.713
Link: CVE-2021-31363
Redhat
No data.