CVE-2023-44182 in Junos OS
Summary
by MITRE • 10/25/2023
An Unchecked Return Value vulnerability in the user interfaces to the Juniper Networks Junos OS and Junos OS Evolved, the CLI, the XML API, the XML Management Protocol, the NETCONF Management Protocol, the gNMI interfaces, and the J-Web User Interfaces causes unintended effects such as demotion or elevation of privileges associated with an operators actions to occur.
Multiple scenarios may occur; for example: privilege escalation over the device or another account, access to files that should not otherwise be accessible, files not being accessible where they should be accessible, code expected to run as non-root may run as root, and so forth.
This issue affects:
Juniper Networks Junos OS
* All versions prior to 20.4R3-S7; * 21.1 versions prior to 21.1R3-S5; * 21.2 versions prior to 21.2R3-S5; * 21.3 versions prior to 21.3R3-S4; * 21.4 versions prior to 21.4R3-S3; * 22.1 versions prior to 22.1R3-S2; * 22.2 versions prior to 22.2R2-S2, 22.2R3; * 22.3 versions prior to 22.3R1-S2, 22.3R2.
Juniper Networks Junos OS Evolved
* All versions prior to 21.4R3-S3-EVO; * 22.1-EVO version 22.1R1-EVO and later versions prior to 22.2R2-S2-EVO, 22.2R3-EVO; * 22.3-EVO versions prior to 22.3R1-S2-EVO, 22.3R2-EVO.
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Analysis
by VulDB Data Team • 10/31/2023
The vulnerability identified as CVE-2023-44182 represents a critical unchecked return value flaw within Juniper Networks Junos OS and Junos OS Evolved platforms that affects multiple user interface components including CLI, XML API, NETCONF, gNMI, and J-Web interfaces. This weakness stems from insufficient validation of return values from system calls and API functions, creating potential pathways for privilege escalation attacks. The vulnerability manifests when the system fails to properly verify the success or failure of operations that should logically succeed under normal conditions, leading to unexpected behavioral changes in operator permissions and system access controls. The flaw exists across multiple software versions and release streams, indicating a systemic issue rather than an isolated incident. According to CWE-252, this vulnerability aligns with unchecked return values, which is a well-documented weakness that can lead to security implications when return codes are not properly validated. The attack surface is extensive as it encompasses all management interfaces that interact with the underlying operating system, making it particularly dangerous for network administrators who rely on these interfaces for device configuration and monitoring. The vulnerability's impact extends beyond simple access control issues to include potential elevation of privileges, where operations intended to run with limited permissions may execute with elevated privileges, and conversely, where operations that should run with elevated privileges may execute with reduced permissions.
The operational impact of CVE-2023-44182 is significant and multifaceted, potentially allowing attackers to gain unauthorized access to sensitive system resources and execute arbitrary code with elevated privileges. When return values are not properly checked, attackers can manipulate the system's behavior to bypass intended access controls, resulting in unauthorized privilege escalation over device management interfaces or other user accounts. This can lead to complete compromise of network infrastructure, as operators may inadvertently execute commands with root privileges when they should only have limited access. The vulnerability also creates scenarios where files that should be restricted become accessible, or conversely, where accessible files become restricted. Network administrators who rely on these interfaces for routine operations may unknowingly perform actions that result in privilege demotion or elevation, creating potential for both accidental and intentional security breaches. The implications are particularly severe for network security operations where maintaining proper privilege separation is critical for system integrity and security posture. The attack vector is particularly concerning as it can be exploited through any of the affected management interfaces, making it difficult to contain and potentially allowing attackers to maintain persistent access to network infrastructure.
Mitigation strategies for CVE-2023-44182 should prioritize immediate patching of affected systems to the latest supported versions, with particular attention to the specific version requirements outlined in the vulnerability advisory. Organizations should implement comprehensive network segmentation and access control measures to limit exposure of affected systems to unauthorized users. The implementation of principle of least privilege should be strictly enforced across all management interfaces, ensuring that operators only have access to resources necessary for their specific roles. Network monitoring and logging should be enhanced to detect anomalous behavior patterns that may indicate exploitation attempts, particularly focusing on privilege escalation events and unusual access patterns. Security teams should conduct thorough vulnerability assessments across all Juniper devices in their network inventory, identifying and patching all affected systems regardless of their operational criticality. The remediation process should include verification of patch installation through configuration checks and testing of management interfaces to ensure proper return value validation. Additionally, organizations should review their incident response procedures to ensure readiness for potential exploitation attempts, as this vulnerability may be actively targeted by threat actors seeking to gain unauthorized access to network infrastructure. Compliance with industry standards such as those outlined in NIST SP 800-53 and ISO 27001 should be maintained throughout the remediation process, ensuring that security controls are properly implemented and tested. Regular security assessments should be conducted to identify similar unchecked return value vulnerabilities in other network devices and applications, as this represents a common weakness that can lead to similar security implications across different platforms and vendors.