An Uncontrolled Resource Consumption vulnerability in BIND component of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to cause Denial of Service (DoS).

On all Junos OS SRX Branch Series, and SRX4000 Series platforms, when DNS proxy is configured, and specific DNS queries are received, resolver's performance is degraded. This denies legitimate clients access to the DNS resolution service.

This issue affects:

Junos OS SRX Branch Series and SRX4000 Series:

• All versions before 21.1R3-S5,
• from 21.2 before 21.2R3-S5,
• from 21.3 before 21.3R3-S4,
• from 21.4 before 21.4R3-S3,
• from 22.1 before 22.1R3-S2,
• from 22.2 before 22.2R2-S2, 22.2R3,
• from 22.3 before 22.3R2-S1, 22.3R3,
• from 22.4 before 22.4R1-S2, 22.4R2.

For this issue to occur, DNS proxy should be configured on the SRX device.

The following software releases have been updated to resolve this specific issue:
Junos OS: 21.1R3-S5, 21.2R3-S5, 21.3R3-S4, 21.4R3-S3, 22.1R3-S2, 22.2R2-S2, 22.2R3, 22.3R2-S1, 22.3R3, 22.4R1-S2, 22.4R2, 23.2R1, and all subsequent releases.

This issue is being tracked as 1691140 which is visible on the Customer Support website.

Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).

2024-09-13: Minor formatting change to cvss field.
2024-04-10: Initial Publication

• KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin Publication Process [juniper.net]
• KB16765: In which releases are vulnerabilities fixed? [juniper.net]
• KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories [juniper.net]
• Report a Security Vulnerability - How to Contact the Juniper Networks Security Incident Response Team
• https://www.cve.org/CVERecord?id=CVE-2022-2795