SB2023011170 - Unchecked input for loop condition in Juniper Junos OS

Security Bulletin ID SB2023011170

CSH Severity

Low

Patch available

YES

Number of vulnerabilities 1

Exploitation vector Local access

Highest impact Denial of service

Breakdown by Severity

Low
Medium
High
Critical

Description

This security bulletin contains information about 1 vulnerability.

1) Unchecked input for loop condition (CVE-ID: CVE-2023-22409)

CWE-ID: CWE-606 - Unchecked Input for Loop Condition

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local authenticated user to perform a denial of service (DoS) attack.

The vulnerability exists due to unchecked input for loop condition error in a NAT library. A local authenticated user can cause a Denial of Service (DoS).

When an inconsistent "deterministic NAT" configuration is present on an SRX, or MX with SPC3 and then a specific CLI command is issued the SPC will crash and restart.

Repeated execution of this command will lead to a sustained DoS.

Remediation

Install update from vendor's website.

References

https://supportportal.juniper.net/s/article/2023-01-Security-Bulletin-Junos-OS-SRX-Series-MX-Series-with-SPC3-When-an-inconsistent-NAT-configuration-exists-and-a-specific-CLI-command-is-issued-the-SPC-will-reboot-CVE-2023-22409