CVE-2024-47489: Junos OS Evolved: ACX Series: Receipt of specific transit protocol packets is incorrectly processed by the RE
An Improper Handling of Exceptional Conditions vulnerability in the Packet Forwarding Engine (pfe) of the Juniper Networks Junos OS Evolved on ACX Series devices allows an unauthenticated, network based attacker sending specific transit protocol traffic to cause a partial Denial of Service (DoS) to downstream devices.
Receipt of specific transit protocol packets is incorrectly processed by the Routing Engine (RE), filling up the DDoS protection queue which is shared between routing protocols. This influx of transit protocol packets causes DDoS protection violations, resulting in protocol flaps which can affect connectivity to networking devices.
This issue affects both IPv4 and IPv6. This issue does not require any specific routing protocol to be configured or enabled.
The following commands can be used to monitor the DDoS protection queue:
labuser@re0> show evo-pfemand host pkt-stats
labuser@re0> show host-path ddos all-policers
This issue affects Junos OS Evolved:
All versions before 21.4R3-S8-EVO, from 22.2 before 22.2R3-S4-EVO, from 22.3 before 22.3R3-S4-EVO, from 22.4 before 22.4R3-S3-EVO, from 23.2 before 23.2R2-EVO, from 23.4 before 23.4R1-S1-EVO, 23.4R2-EVO, from 24.2 before 24.2R2-EVO.
Other sources
An Improper Handling of Exceptional Conditions vulnerability in the Packet Forwarding Engine (pfe) of the Juniper Networks Junos OS Evolved on ACX Series devices allows an unauthenticated, network based attacker sending specific transit protocol traffic to cause a partial Denial of Service (DoS) to downstream devices.
Receipt of specific transit protocol packets is incorrectly processed by the Routing Engine (RE), filling up the DDoS protection queue which is shared between routing protocols. This influx of transit protocol packets causes DDoS protection violations, resulting in protocol flaps which can affect connectivity to networking devices.
This issue affects both IPv4 and IPv6. This issue does not require any specific routing protocol to be configured or enabled.
The following commands can be used to monitor the DDoS protection queue:
labuser@re0> show evo-pfemand host pkt-stats
?? labuser@re0> show host-path ddos all-policers
This issue affects Junos OS Evolved:
All versions before 21.4R3-S8-EVO, from 22.2 before 22.2R3-S4-EVO, from 22.3 before 22.3R3-S4-EVO, from 22.4 before 22.4R3-S3-EVO, from 23.2 before 23.2R2-EVO, from 23.4 before 23.4R1-S1-EVO, 23.4R2-EVO, from 24.2 before 24.2R2-EVO.
— NVD
Affected Software
Remediation
Information
Event History
Frequently Asked Questions
What is the severity of CVE-2024-47489?
CVE-2024-47489 has been assigned a high severity rating due to its potential to cause denial of service.
How do I fix CVE-2024-47489?
To mitigate CVE-2024-47489, users should upgrade to the latest version of Junos OS Evolved that addresses this vulnerability.
Who is affected by CVE-2024-47489?
CVE-2024-47489 affects Juniper Networks Junos OS Evolved on ACX Series devices prior to version 21.4R3-S8-EVO.
What kind of attack does CVE-2024-47489 allow?
CVE-2024-47489 allows an unauthenticated network-based attacker to send specific transit protocol traffic that could lead to partial Denial of Service.
When was CVE-2024-47489 reported?
CVE-2024-47489 was reported in 2024 as a vulnerability affecting the Packet Forwarding Engine of Junos OS Evolved.