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.
References
| Link | Resource |
|---|---|
| https://supportportal.juniper.net/JSA110083 | Vendor Advisory |
Configurations
Configuration 1 (hide)
| AND |
|
History
No history.
Information
Published : 2026-07-09 22:17
Updated : 2026-07-14 15:19
NVD link : CVE-2026-57023
Mitre link : CVE-2026-57023
CVE.ORG link : CVE-2026-57023
JSON object : View
Products Affected
juniper
- srx4120
- srx320
- srx4200
- srx5800
- srx4700
- srx345
- srx440
- mx240
- srx1500
- srx340
- srx2300
- srx4600
- srx400
- mx-spc3
- srx300
- srx5400
- srx4100
- srx1600
- srx380
- srx4300
- mx960
- srx5600
- mx480
- junos
CWE
CWE-1284
Improper Validation of Specified Quantity in Input