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Juniper Junos OS: 2024-01 Security Bulletin: Junos OS: PTX Series: In an FTI scenario MPLS packets hitting reject next-hop will cause a host path wedge condition (JSA75741) (CVE-2024-21600)

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Juniper Junos OS: 2024-01 Security Bulletin: Junos OS: PTX Series: In an FTI scenario MPLS packets hitting reject next-hop will cause a host path wedge condition (JSA75741) (CVE-2024-21600)

Severity
6
CVSS
(AV:A/AC:L/Au:N/C:N/I:N/A:C)
Published
01/10/2024
Created
01/12/2024
Added
01/11/2024
Modified
01/28/2025

Description

An 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). When 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. Please 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. The following log message can be seen when the issue occurs: Cmerror 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>]) This issue affects Juniper Networks Junos OS: *All versions earlier than 20.4R3-S8; *21.1 versions earlier than 21.1R3-S4; *21.2 versions earlier than 21.2R3-S6; *21.3 versions earlier than 21.3R3-S3; *21.4 versions earlier than 21.4R3-S5; *22.1 versions earlier than 22.1R2-S2, 22.1R3; *22.2 versions earlier than 22.2R2-S1, 22.2R3.

Solution(s)

  • juniper-junos-os-upgrade-latest

References

  • https://attackerkb.com/topics/cve-2024-21600
  • CVE - 2024-21600
  • JSA75741
  • 查看数 703
  • 已创建
  • 最后回复

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