Junos OS (SRX firewalls)
CVE-2024-39515: With BGP traceoptions enabled, receipt of specifically malformed BGP update causes RPD crash
An Improper Validation of Consistency within Input vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network-based attacker sending a specifically malformed BGP packet to cause rpd to crash and restart, resulting in a Denial of Service (DoS).
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Junos OS 0 | 21.4R3-S8 or later |
| Junos OS 22.2 | 22.2R3-S5 or later |
| Junos OS 22.3 | 22.3R3-S4 or later |
| Junos OS 22.4 | 22.4R3-S3 or later |
| Junos OS 23.2 | 23.2R2-S2 or later |
| Junos OS 23.4 | 23.4R2 or later |
| Junos OS Evolved 0 | 21.4R3-S8-EVO or later |
| Junos OS Evolved 22.2-EVO | 22.2R3-S5-EVO or later |
| Junos OS Evolved 22.3-EVO | 22.3R3-S4-EVO or later |
| Junos OS Evolved 22.4-EVO | 22.4R3-S3-EVO or later |
| Junos OS Evolved 23.2-EVO | 23.2R2-S2-EVO or later |
| Junos OS Evolved 23.4-EVO | 23.4R2-EVO or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
An Improper Validation of Consistency within Input vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network-based attacker sending a specifically malformed BGP packet to cause rpd to crash and restart, resulting in a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition.
In some cases, rpd fails to restart requiring a manual restart via the 'restart routing' CLI command.
This issue only affects systems with BGP traceoptions enabled and
requires a BGP session to be already established. Systems without BGP traceoptions enabled are not affected by this issue.
This issue affects iBGP and eBGP, and both IPv4 and IPv6 are affected by this vulnerability.
This issue affects:
Junos OS:
- All versions before 21.4R3-S8,
- 22.2 before 22.2R3-S5,
- 22.3 before 22.3R3-S4,
- 22.4 before 22.4R3-S3,
- 23.2 before 23.2R2-S2,
- 23.4 before 23.4R2;
Junos OS Evolved:
- All versions before 21.4R3-S8-EVO,
- 22.2-EVO before 22.2R3-S5-EVO,
- 22.3-EVO before 22.3R3-S4-EVO,
- 22.4-EVO before 22.4R3-S3-EVO,
- 23.2-EVO before 23.2R2-S2-EVO,
- 23.4-EVO before 23.4R2-EVO.
Am I affected?
One of the following traceoptions configurations, either at the top level, under [logical-systems], or [routing-instances], is required to be potentially exposed to this issue:
[protocols bgp traceoptions] [protocols bgp group <group-name> traceoptions] [protocols bgp group <group-name> neighbor <address> traceoptions]
Workarounds
Disable BGP traceoptions if they are not being used for active troubleshooting.
Exploitation
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.