CVE-2023-28962 : Vulnerability Insights and Analysis

An Improper Authentication vulnerability in upload-file.php, used by the J-Web component of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to upload arbitrary files to temporary folders on the device.

Understanding CVE-2023-28962

This CVE affects Juniper Networks Junos OS versions prior to 19.4R3-S11; 20.1 version 20.1R1 and later versions; 20.2 versions prior to 20.2R3-S7; 20.3 version 20.3R1 and later versions; 20.4 versions prior to 20.4R3-S6; 21.1 version 21.1R1 and later versions; 21.2 versions prior to 21.2R3-S4; 21.3 versions prior to 21.3R3-S3; 21.4 versions prior to 21.4R3-S3; 22.1 versions prior to 22.1R3-S1; 22.2 versions prior to 22.2R2-S1, 22.2R3; 22.3 versions prior to 22.3R1-S2, 22.3R2.

What is CVE-2023-28962?

This vulnerability in Junos OS allows unauthorized users to upload malicious files to the device, potentially compromising its security and integrity.

The Impact of CVE-2023-28962

Exploitation of this vulnerability could lead to unauthorized manipulation of sensitive files on the affected Juniper Networks Junos OS devices, potentially resulting in further security breaches and data loss.

Technical Details of CVE-2023-28962

This vulnerability is classified under CWE-287 - Improper Authentication. The CVSS v3.1 base score for this vulnerability is 5.3, with a Medium severity rating. It has a low attack complexity and does not require any privileges to exploit.

Vulnerability Description

The improper authentication vulnerability in Juniper Networks Junos OS allows attackers to upload arbitrary files to temporary folders on the device without the need for authentication.

Affected Systems and Versions

Juniper Networks Junos OS versions listed in the description are affected by this vulnerability and require immediate attention to secure the systems.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending malicious requests to the upload-file.php component, enabling them to upload files to the device without proper authentication.

Mitigation and Prevention

To mitigate the risks associated with CVE-2023-28962, immediate actions and long-term security practices are essential.

Immediate Steps to Take

Disable the J-Web component or restrict access to trusted hosts to prevent unauthorized file uploads and potential exploitation of this vulnerability.

Long-Term Security Practices

Regularly monitor and update Juniper Networks Junos OS versions to ensure the latest security patches are applied, reducing the risk of future vulnerabilities.

Patching and Updates

Juniper Networks has released software updates to address this specific issue. It is recommended to update to Junos OS versions 19.4R3-S11, 20.2R3-S7, 20.4R3-S6, 21.2R3-S4, 21.3R3-S3, 21.4R3-S3, 22.1R3-S1, 22.2R2-S1, 22.2R3, 22.3R1-S2, 22.3R2, 22.4R1, 22.4R2, 23.1R1, or any subsequent releases to mitigate the risks associated with this vulnerability.