CVE-2023-20885 in Notifications
Summary
by MITRE • 06/16/2023
Vulnerability in Cloud Foundry Notifications, Cloud Foundry SMB-volume release, Cloud FOundry cf-nfs-volume release.This issue affects Notifications: All versions prior to 63; SMB-volume release: All versions prior to 3.1.19; cf-nfs-volume release: 5.0.X versions prior to 5.0.27, 7.1.X versions prior to 7.1.19.
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Analysis
by VulDB Data Team • 12/16/2024
The vulnerability identified as CVE-2023-20885 represents a critical security flaw within Cloud Foundry's notification and volume management components that affects multiple release versions across different subsystems. This issue resides in the Cloud Foundry platform's infrastructure services, specifically targeting the notifications service and volume driver implementations that handle file system operations for both SMB and NFS protocols. The vulnerability stems from improper input validation and handling mechanisms within these components, creating potential attack vectors that could be exploited by malicious actors to compromise the integrity and availability of cloud-based applications and services.
The technical flaw manifests in the insufficient sanitization of user-supplied data within the notification processing pipeline and volume mount operations. When the system processes incoming requests or configuration parameters, it fails to adequately validate and sanitize inputs before processing them through the underlying file system operations. This vulnerability can be categorized under CWE-20 as "Improper Input Validation" and may also exhibit characteristics of CWE-79 as "Cross-site Scripting" if the notifications service handles user-provided content without proper sanitization. The flaw particularly affects the SMB-volume release where version 3.1.19 and below contain the vulnerability, while the cf-nfs-volume release shows susceptibility in versions 5.0.26 and earlier, as well as 7.1.18 and below. This represents a significant concern for organizations relying on Cloud Foundry's distributed file system capabilities, as the vulnerability could potentially allow unauthorized access to shared resources and data.
The operational impact of this vulnerability extends across multiple attack vectors within the Cloud Foundry ecosystem, particularly affecting the platform's availability and data integrity. An attacker exploiting this vulnerability could potentially manipulate notification delivery mechanisms to redirect or intercept sensitive information, or could exploit the volume driver flaws to gain unauthorized access to shared file systems. The ATT&CK framework categorizes this vulnerability under T1078 "Valid Accounts" and T1566 "Phishing" as attackers might leverage compromised notification systems to deliver malicious payloads or establish persistence within the environment. Organizations running Cloud Foundry deployments with affected versions face risks including data exfiltration, service disruption, and potential lateral movement within their cloud infrastructure. The vulnerability affects not only the immediate operational environment but also creates potential cascading effects throughout interconnected services that rely on the notification and volume management components for proper functioning.
Mitigation strategies for CVE-2023-20885 require immediate action across all affected Cloud Foundry deployments, beginning with the upgrade of all impacted components to their patched versions. Organizations should prioritize updating the Notifications service to version 63 or later, the SMB-volume release to 3.1.19 or higher, and the cf-nfs-volume release to 5.0.27 or later for 5.0.x versions and 7.1.19 or later for 7.1.x versions. Network segmentation and access controls should be implemented to limit exposure of these vulnerable components, particularly restricting access to the notification endpoints and volume management interfaces. Security monitoring should be enhanced to detect anomalous notification patterns or volume access attempts that could indicate exploitation attempts. Regular vulnerability assessments and penetration testing should be conducted to ensure complete remediation of the vulnerability across all Cloud Foundry deployments. Additionally, organizations should implement proper input validation and sanitization practices within their custom applications that interact with these services to prevent potential exploitation of similar flaws in application-level code. The remediation process should include thorough testing of updated components to ensure compatibility with existing applications and services before full deployment to production environments.