CVE-2024-39521: Junos OS Evolved: CLI parameter processing issue allows privilege escalation
First published: Thu Jul 11 2024(Updated: )
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: * 21.1-EVO versions 21.1R1-EVO and later before 21.2R3-S8-EVO, * 21.4-EVO versions before 21.4R3-S7-EVO, * 22.1-EVO versions before 22.1R3-S6-EVO, * 22.2-EVO versions before 22.2R3-EVO, * 22.3-EVO versions before 22.3R2-EVO.
Credit: sirt@juniper.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Juniper Networks Junos OS Evolved | >=21.1<21.2 | |
| Juniper Networks Junos OS Evolved | =21.2 | |
| Juniper Networks Junos OS Evolved | =21.2-r1 | |
| Juniper Networks Junos OS Evolved | =21.2-r1-s1 | |
| Juniper Networks Junos OS Evolved | =21.2-r1-s2 | |
| Juniper Networks Junos OS Evolved | =21.2-r2 | |
| Juniper Networks Junos OS Evolved | =21.2-r2-s1 | |
| Juniper Networks Junos OS Evolved | =21.2-r2-s2 | |
| Juniper Networks Junos OS Evolved | =21.2-r3 | |
| Juniper Networks Junos OS Evolved | =21.2-r3-s1 | |
| Juniper Networks Junos OS Evolved | =21.2-r3-s2 | |
| Juniper Networks Junos OS Evolved | =21.2-r3-s3 | |
| Juniper Networks Junos OS Evolved | =21.2-r3-s4 | |
| Juniper Networks Junos OS Evolved | =21.2-r3-s5 | |
| Juniper Networks Junos OS Evolved | =21.2-r3-s6 | |
| Juniper Networks Junos OS Evolved | =21.2-r3-s7 | |
| Juniper Networks Junos OS Evolved | =21.4 | |
| Juniper Networks Junos OS Evolved | =21.4-r1 | |
| Juniper Networks Junos OS Evolved | =21.4-r1-s1 | |
| Juniper Networks Junos OS Evolved | =21.4-r1-s2 | |
| Juniper Networks Junos OS Evolved | =21.4-r2 | |
| Juniper Networks Junos OS Evolved | =21.4-r2-s1 | |
| Juniper Networks Junos OS Evolved | =21.4-r2-s2 | |
| Juniper Networks Junos OS Evolved | =21.4-r3 | |
| Juniper Networks Junos OS Evolved | =21.4-r3-s1 | |
| Juniper Networks Junos OS Evolved | =21.4-r3-s2 | |
| Juniper Networks Junos OS Evolved | =21.4-r3-s3 | |
| Juniper Networks Junos OS Evolved | =21.4-r3-s4 | |
| Juniper Networks Junos OS Evolved | =21.4-r3-s5 | |
| Juniper Networks Junos OS Evolved | =21.4-r3-s6 | |
| Juniper Networks Junos OS Evolved | =21.4-r3-s7 | |
| Juniper Networks Junos OS Evolved | =22.2 | |
| Juniper Networks Junos OS Evolved | =22.2-r1 | |
| Juniper Networks Junos OS Evolved | =22.2-r1-s1 | |
| Juniper Networks Junos OS Evolved | =22.2-r2 | |
| Juniper Networks Junos OS Evolved | =22.2-r2-s2 | |
| Juniper Networks Junos OS Evolved | =22.3 | |
| Juniper Networks Junos OS Evolved | =22.3-r1 | |
| Juniper Networks Junos OS Evolved | =22.3-r1-s1 | |
| Juniper Networks Junos OS Evolved | =22.3-r1-s2 |
Remedy
The following software releases have been updated to resolve this specific issue: 21.2R3-S8-EVO, 21.4R3-S7-EVO, 22.1R3-S6-EVO, 22.2R3-EVO, 22.3R2-EVO, 22.4R1-EVO, and all subsequent releases.
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-39521?
CVE-2024-39521 has been rated as a high severity vulnerability due to its potential for local privilege escalation.
How can I remediate CVE-2024-39521?
To fix CVE-2024-39521, apply the latest patch or update provided by Juniper Networks for affected versions of Junos OS Evolved.
What versions of Junos OS Evolved are affected by CVE-2024-39521?
CVE-2024-39521 affects Junos OS Evolved versions between 21.1 and 21.2, including specific revisions and releases of 21.2.
Who can exploit CVE-2024-39521?
CVE-2024-39521 can be exploited by local, authenticated users with low privileges.
What are the potential consequences of exploiting CVE-2024-39521?
Exploitation of CVE-2024-39521 could lead to full system compromise by elevating privileges to 'root'.
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- canonical/juniper networks junos os evolved
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