Junos OS Evolved PrivEsc Local Auth Improper Neutralization CVE-2024-39520
CVE-2024-39520 Published on July 11, 2024
Junos OS Evolved: CLI parameter processing issue allows privilege escalation
An Improper Neutralization of Special Elements vulnerability in Juniper Networks Junos OS Evolved commands allows a local, authenticated attacker with low privileges to escalate their privileges to 'root' leading to a full compromise of the system.
The Junos OS Evolved CLI doesn't properly handle command options in some cases, allowing users which execute specific CLI commands with a crafted set of parameters to escalate their privileges to root on shell level.
This issue affects Junos OS Evolved:
* All version before 20.4R3-S6-EVO,
* 21.2-EVO versions before 21.2R3-S4-EVO,
* 21.4-EVO versions before 21.4R3-S6-EVO,
* 22.2-EVO versions before 22.2R2-S1-EVO, 22.2R3-EVO,
* 22.3-EVO versions before 22.3R2-EVO.
Vulnerability Analysis
CVE-2024-39520 is exploitable with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is a Shell injection Vulnerability?
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
CVE-2024-39520 has been classified to as a Shell injection vulnerability or weakness.
Products Associated with CVE-2024-39520
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Affected Versions
Juniper Networks Junos OS Evolved:- Before 20.4R3-S6-EVO is affected.
- Version 21.2-EVO and below 21.2R3-S4-EVO is affected.
- Version 21.4-EVO and below 21.4R3-S6-EVO is affected.
- Version 22.2-EVO and below 22.2R2-S1-EVO, 22.2R3-EVO is affected.
- Version 22.3-EVO and below 22.3R2-EVO is affected.
- Version 21.2 and below 21.2r3-s4 is affected.
- Version 21.4 and below 21.4r3-s6 is affected.
- Version 22.2 and below 22.2r2-s1 is affected.
- Version 22.3 and below 22.3r2 is affected.
- Version 22.2 and below 22.2r3 is affected.
- Before 20.4r3-s6 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.