CVE-2026-57023
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
An Improper Validation of Specified Quantity in Input vulnerability in the TCP proxy plugin of Juniper Networks Junos OS on MX Series with SPC3, and SRX Series allows an unauthenticated, network-based attacker to cause a complete Denial of Service (DoS).
When TCP proxy is engaged in a flow session, to support ALGs, Advanced Anti-Malware, ICAP or UTM, a TCP packet with specifically malformed TCP header will cause flow processing daemon (flowd) to crash and restart. This causes a complete service outage until the system has automatically recovered.
This issue affects Junos OS on MX with SPC3, and SRX Series:
- 23.4 versions before 23.4R2-S7,
- 24.2 versions before 24.2R2-S4,
- 24.4 versions before 24.4R2-S3,
- 25.2 versions before 25.2R2.
This issue does not affect releases before 23.4R1.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Juniper Networks | Junos OS | 23.4 < 23.4R2-S7 | affected |
| Juniper Networks | Junos OS | 24.2 < 24.2R2-S4 | affected |
| Juniper Networks | Junos OS | 24.4 < 24.4R2-S3 | affected |
| Juniper Networks | Junos OS | 25.2 < 25.2R2 | affected |
Weaknesses
- CWE-1284: CWE-1284 Improper Validation of Specified Quantity in Input
Workarounds
There are no known workarounds for this issue.
References
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