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.
Weakness
The product does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Junos | Juniper | 23.4 (including) | 23.4 (including) |
| Junos | Juniper | 23.4-r1 (including) | 23.4-r1 (including) |
| Junos | Juniper | 23.4-r1-s1 (including) | 23.4-r1-s1 (including) |
| Junos | Juniper | 23.4-r1-s2 (including) | 23.4-r1-s2 (including) |
| Junos | Juniper | 23.4-r2 (including) | 23.4-r2 (including) |
| Junos | Juniper | 23.4-r2-s1 (including) | 23.4-r2-s1 (including) |
| Junos | Juniper | 23.4-r2-s2 (including) | 23.4-r2-s2 (including) |
| Junos | Juniper | 23.4-r2-s3 (including) | 23.4-r2-s3 (including) |
| Junos | Juniper | 23.4-r2-s4 (including) | 23.4-r2-s4 (including) |
| Junos | Juniper | 24.2 (including) | 24.2 (including) |
| Junos | Juniper | 24.2-r1 (including) | 24.2-r1 (including) |
| Junos | Juniper | 24.2-r1-s1 (including) | 24.2-r1-s1 (including) |
| Junos | Juniper | 24.2-r1-s2 (including) | 24.2-r1-s2 (including) |
| Junos | Juniper | 24.2-r2 (including) | 24.2-r2 (including) |
| Junos | Juniper | 24.4 (including) | 24.4 (including) |
| Junos | Juniper | 24.4-r1 (including) | 24.4-r1 (including) |
| Junos | Juniper | 24.4-r1-s2 (including) | 24.4-r1-s2 (including) |
| Junos | Juniper | 24.4-r1-s3 (including) | 24.4-r1-s3 (including) |