SB2024101115 - Denial of service in Junos OS Evolved pfe on ACX series

Security Bulletin ID SB2024101115

CSH Severity

Medium

Patch available

YES

Number of vulnerabilities 1

Exploitation vector Remote access

Highest impact Partial DoS

Breakdown by Severity

Low
Medium
High
Critical

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2024-47489)

CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper error handling in the Packet Forwarding Engine (pfe) of the Juniper Networks Junos OS Evolved on ACX Series 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.

Remediation

Install update from vendor's website.

References

https://supportportal.juniper.net/s/article/2024-10-Security-Bulletin-Junos-OS-Evolved-ACX-Series-Receipt-of-specific-transit-protocol-packets-is-incorrectly-processed-by-the-RE-CVE-2024-47489