Juniper Junos OS up to 22.4R2-S1 on SRX/EX J-Web out-of-bounds write

Summaryinfo

A vulnerability classified as critical was found in Juniper Junos OS on SRX/EX. Affected is an unknown function of the component J-Web. Such manipulation leads to out-of-bounds write. This vulnerability is uniquely identified as CVE-2024-21591. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Juniper Junos OS on SRX/EX (Router Operating System) and classified as very critical. Affected by this issue is an unknown function of the component J-Web. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was disclosed 01/12/2024 as JSA75729. The advisory is available at supportportal.juniper.net. This vulnerability is handled as CVE-2024-21591 since 12/27/2023. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 10/10/2024).

Upgrading to version 20.4R3-S9, 21.2R3-S7, 21.3R3-S5, 21.4R3-S5, 22.1R3-S4, 22.2R3-S3, 22.3R3-S2, 22.4R2-S2 or 22.4R3 eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• Juniper

Name

• Junos OS

Version

• 20.4R3-S8
• 21.0
• 21.1
• 21.2
• 21.2R3-S6
• 21.3
• 21.3R3-S4
• 21.4R3-S4
• 22.0
• 22.1
• 22.1R3-S3
• 22.2
• 22.2R3-S2
• 22.3
• 22.3R3-S1
• 22.4R2-S1

License

• commercial

Website

• Vendor: https://www.juniper.net/

CPE 2.3info

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