CVE-2024-21591

Junos OS: SRX Series and EX Series: Security Vulnerability in J-web allows a preAuth Remote Code Execution

State: Published
Severity: 9.8 Critical
Published: Jan 12, 2024
Updated: Oct 25, 2024
Reserved: Dec 27, 2023

Description

An Out-of-bounds Write vulnerability in J-Web of Juniper Networks Junos OS on SRX Series and EX Series allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS), or Remote Code Execution (RCE) and obtain root privileges on the device.

This issue is caused by use of an insecure function allowing an attacker to overwrite arbitrary memory.

This issue affects Juniper Networks Junos OS SRX Series and EX Series:

* Junos OS versions earlier than 20.4R3-S9; * Junos OS 21.2 versions earlier than 21.2R3-S7; * Junos OS 21.3 versions earlier than 21.3R3-S5; * Junos OS 21.4 versions earlier than 21.4R3-S5; * Junos OS 22.1 versions earlier than 22.1R3-S4; * Junos OS 22.2 versions earlier than 22.2R3-S3; * Junos OS 22.3 versions earlier than 22.3R3-S2; * Junos OS 22.4 versions earlier than 22.4R2-S2, 22.4R3.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	juniper

Weaknesses

CWE-787 Out-of-bounds Write

Affected Products

Product	Versions
Junos OSJuniper Networks	before 20.4R3-S9Affected 21.2 to before 21.2R3-S7Affected 21.3 to before 21.3R3-S5Affected 21.4 to before 21.4R3-S5Affected 22.1 to before 22.1R3-S4Affected 22.2 to before 22.2R3-S3Affected 22.3 to before 22.3R3-S2Affected 22.4 to before 22.4R2-S2, 22.4R3Affected

References

https://supportportal.juniper.net/JSA75729vendor-advisory
https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:Ntechnical-description
https://curesec.com/blog/article/CVE-2024-21591_Juniper_Remote_Code_Exec.htmlthird-party-advisory

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