CVE-2024-21591

Critical

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.

SeverityCritical
CVSS9.8
Exploit probability—
ProductJuniper Junos
PublishedJan 12, 2024
First seenJan 12, 2024

How to fix

Update
  • juniper junos20.4 or later

Affected products

ProductAffected versionsFixed in
juniper junosv < 20.4, 20.4, 21.2, 21.3, 21.4, 22.1, 22.2, 22.3, 22.420.4

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