CVE-2024-39556

Technical Description

A Stack-Based Buffer Overflow vulnerability in Juniper Networks Junos OS and Juniper Networks Junos OS Evolved may allow a local, low-privileged attacker with access to the CLI the ability to load a malicious certificate file, leading to a limited Denial of Service (DoS) or privileged code execution.

By exploiting the 'set security certificates' command with a crafted certificate file, a malicious attacker with access to the CLI could cause a crash of the command management daemon (mgd), limited to the local user's command interpreter, or potentially trigger a stack-based buffer overflow.

This issue affects:

 Junos OS:

* All versions before 21.4R3-S7,

* from 22.1 before 22.1R3-S6,

* from 22.2 before 22.2R3-S4,

* from 22.3 before 22.3R3-S3,

* from 22.4 before 22.4R3-S2,

* from 23.2 before 23.2R2,

* from 23.4 before 23.4R1-S1, 23.4R2; 

Junos OS Evolved:

* All versions before 21.4R3-S7-EVO,

* from 22.1-EVO before 22.1R3-S6-EVO,

* from 22

Remediation

Check the references section for vendor advisories and patches from juniper. Update junos to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected Products

References