CVSS: v3.1: 5.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N)CVSS: v4.0: 6.9 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/RE:M)
An Improper Check for Unusual or Exceptional Conditions vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause an integrity impact to the downstream devices.When a peer sends a BGP update message which contains the aggregator attribute with an ASN value of zero (0), rpd accepts and propagates this attribute, which can cause issues for downstream BGP peers receiving this.
This issue affects:
Junos OS:
Junos OS Evolved:
To be exposed to this issue a minimal BGP configuration like the following is required:[ protocols bgp group <name> neighbor ... ]
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
This issue was seen during production usage.
The following software releases have been updated to resolve this specific issue:Junos OS Evolved: 21.4R3-S7-EVO, 22.2R3-S4-EVO, 22.4R3-EVO, 23.2R1-EVO, and all subsequent releases;Junos OS: 21.4R3-S6, 22.1R3-S6, 22.2R3-S3, 22.4R3, 23.2R1, and all subsequent releases.
This issue is being tracked as 1708088 which is visible on the Customer Support website.
Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).
There are no known workarounds for this issue.
2024-10-09: Initial Publication