Juniper Junos OS on EX J-Web external variable

Summaryinfo

A vulnerability was found in Juniper Junos OS on EX. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the component J-Web. Such manipulation leads to external variable. This vulnerability is documented as CVE-2023-36845. The attack can be executed remotely. Additionally, an exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Juniper Junos OS on EX (Router Operating System) (version now known). It has been rated as problematic. Affected by this issue is some unknown processing of the component J-Web. The manipulation with an unknown input leads to a external variable vulnerability. Using CWE to declare the problem leads to CWE-473. A PHP application does not properly protect against the modification of variables from external sources, such as query parameters or cookies. This can expose the application to numerous weaknesses that would not exist otherwise. Impacted is integrity. CVE summarizes:

A PHP External Variable Modification vulnerability in J-Web of Juniper Networks Junos OS on EX Series and SRX Series allows an unauthenticated, network-based attacker to control certain, important environments variables. Utilizing a crafted request an attacker is able to modify a certain PHP environment variable leading to partial loss of integrity, which may allow chaining to other vulnerabilities. This issue affects Juniper Networks Junos OS on SRX Series: * All versions prior to 21.4R3-S5; * 22.1 versions prior to 22.1R3-S4; * 22.2 versions prior to 22.2R3-S2; * 22.3 versions prior to 22.3R2-S2, 22.3R3-S1; * 22.4 versions prior to 22.4R2-S1, 22.4R3; * 23.2 versions prior to 23.2R1-S1, 23.2R2.

The weakness was released 08/17/2023 as JSA72300. The advisory is available at supportportal.juniper.net. This vulnerability is handled as CVE-2023-36845 since 06/27/2023. Technical details are unknown but an exploit is available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 09/09/2024).

It is declared as attacked. This issue was added on 11/13/2023 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 11/17/2023:

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• Juniper

Name

• Junos OS

License

• commercial

Website

• Vendor: https://www.juniper.net/

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