Junos OS (SRX firewalls)
CVE-2024-30401: MX Series and EX9200-15C: Stack-based buffer overflow in aftman
An Out-of-bounds Read vulnerability in the advanced forwarding management process aftman of Juniper Networks Junos OS on MX Series with MPC10E, MPC11, MX10K-LC9600 line cards, MX304, and EX9200-15C, may allow an attacker to exploit a stack-based buffer overflow, leading to a reboot of the FPC.
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 (MX Series, EX9200-15C) 21.2 | 21.2R3-S1 or later |
| Junos OS (MX Series, EX9200-15C) 21.4 | 21.4R3 or later |
| Junos OS (MX Series, EX9200-15C) 22.1 | 22.1R2 or later |
| Junos OS (MX Series, EX9200-15C) 22.2 | 22.2R2 or later |
| Junos OS (MX Series, EX9200-15C) 0, 20.4 | Not affected |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
An Out-of-bounds Read vulnerability in the advanced forwarding management process aftman of Juniper Networks Junos OS on MX Series with MPC10E, MPC11, MX10K-LC9600 line cards, MX304, and EX9200-15C, may allow an attacker to exploit a stack-based buffer overflow, leading to a reboot of the FPC.
Through code review, it was determined that the interface definition code for aftman could read beyond a buffer boundary, leading to a stack-based buffer overflow. This issue affects Junos OS on MX Series and EX9200-15C:
- from 21.2 before 21.2R3-S1,
- from 21.4 before 21.4R3,
- from 22.1 before 22.1R2,
- from 22.2 before 22.2R2;
This issue does not affect:
- versions of Junos OS prior to 20.3R1;
- any version of Junos OS 20.4.
Workarounds
There are no known 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.