CVE-2026-21920
8.7
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:X/RE:M/U:XShow more
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:X/RE:M/U:XShow less
Source: sirt@juniper.net (Secondary)
Description
An Unchecked Return Value vulnerability in the DNS module of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).
If an SRX Series device configured for DNS processing, receives a specifically formatted DNS request flowd will crash and restart, which causes a service interruption until the process has recovered.
This issue affects Junos OS on SRX Series:
* 23.4 versions before 23.4R2-S5,
* 24.2 versions before 24.2R2-S1,
* 24.4 versions before 24.4R2.
This issue does not affect Junos OS versions before 23.4R1.
Affected (18)
Configuration A
| Vulnerable Software | Affected Versions |
|---|---|
| Version 23.4 |
| Running on/with | Platform Versions |
|---|---|
Juniper Srx1500 | All versions |
Juniper Srx1600 | All versions |
Juniper Srx2300 | All versions |
Juniper Srx300 | All versions |
Juniper Srx320 | All versions |
Juniper Srx340 | All versions |
Juniper Srx345 | All versions |
Juniper Srx380 | All versions |
Juniper Srx4100 | All versions |
Juniper Srx4120 | All versions |
Juniper Srx4200 | All versions |
Juniper Srx4300 | All versions |
Juniper Srx4600 | All versions |
Juniper Srx4700 | All versions |
Juniper Srx5400 | All versions |
Juniper Srx5600 | All versions |
Juniper Srx5800 | All versions |
References (2)
Timeline
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