Junos OS (SRX firewalls)
CVE-2024-30395: A malformed BGP tunnel encapsulation attribute will lead to an rpd crash
An Improper Validation of Specified Type of Input vulnerability in Routing Protocol Daemon (RPD) of Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause 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 | 21.2R3-S7 or later |
| Junos OS 21.3 | 21.3R3-S5 or later |
| Junos OS 21.4 | 21.4R3-S5 or later |
| Junos OS 22.1 | 22.1R3-S5 or later |
| Junos OS 22.2 | 22.2R3-S3 or later |
| Junos OS 22.3 | 22.3R3-S2 or later |
| Junos OS 22.4 | 22.4R3 or later |
| Junos OS 23.2 | 23.2R1-S2, 23.2R2 or later |
| Junos OS Evolved 0 | 21.2R3-S7-EVO or later |
| Junos OS Evolved 21.3-EVO | 21.3R3-S5-EVO or later |
| Junos OS Evolved 21.4-EVO | 21.4R3-S5-EVO or later |
| Junos OS Evolved 22.2-EVO | 22.2R3-S3-EVO or later |
| Junos OS Evolved 22.3-EVO | 22.3R3-S2-EVO or later |
| Junos OS Evolved 22.4-EVO | 22.4R3-EVO or later |
| Junos OS Evolved 23.2-EVO | 23.2R1-S2-EVO, 23.2R2-EVO or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
An Improper Validation of Specified Type of Input vulnerability in Routing Protocol Daemon (RPD) of Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause Denial of Service (DoS).
If a BGP update is received over an established BGP session which contains a tunnel encapsulation attribute with a specifically malformed TLV, rpd will crash and restart. This issue affects:
Junos OS:
- all versions before 21.2R3-S7,
- from 21.3 before 21.3R3-S5,
- from 21.4 before 21.4R3-S5,
- from 22.1 before 22.1R3-S5,
- from 22.2 before 22.2R3-S3,
- from 22.3 before 22.3R3-S2,
- from 22.4 before 22.4R3,
- from 23.2 before 23.2R1-S2, 23.2R2.
Junos OS Evolved:
- all versions before 21.2R3-S7-EVO,
- from 21.3-EVO before 21.3R3-S5-EVO,
- from 21.4-EVO before 21.4R3-S5-EVO,
- from 22.2-EVO before 22.2R3-S3-EVO,
- from 22.3-EVO before 22.3R3-S2-EVO,
- from 22.4-EVO before 22.4R3-EVO,
- from 23.2-EVO before 23.2R1-S2-EVO, 23.2R2-EVO.
This is a related but separate issue than the one described in JSA75739
Am I affected?
To be exposed to this vulnerability BGP needs to be configured as in the following example, but no further options need to be enabled:
[protocols bgp group <group> neighbor ...]
Workarounds
There are no available workarounds for this issue.
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.