CVE-2023-40649 in SC9863A
Summary
by MITRE • 10/25/2023
In Messaging, there is a possible missing permission check. This could lead to local information disclosure with no additional execution privileges needed
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Analysis
by VulDB Data Team • 10/25/2023
The vulnerability identified as CVE-2023-40649 resides within the messaging component of a software system, representing a critical permission control flaw that undermines the security model. This issue manifests as a missing permission check that allows unauthorized access to sensitive information, fundamentally compromising the principle of least privilege that governs secure system design. The vulnerability specifically affects the messaging subsystem where proper authorization controls should prevent unauthorized entities from accessing confidential data streams. According to CWE-284, this represents an inadequate permission check that directly enables privilege escalation or unauthorized data access, making it a significant concern for system integrity and data confidentiality.
The technical implementation flaw occurs when the messaging system fails to validate whether a requesting entity possesses the necessary permissions before granting access to message content or metadata. This missing validation step creates an information disclosure pathway where any local process or user can potentially retrieve messages intended for other users or system components. The vulnerability does not require additional execution privileges, meaning that even unprivileged local users can exploit this weakness to access sensitive communications. This characteristic places the vulnerability in the category of low-privilege information disclosure issues that can be leveraged by attackers who have already gained basic system access.
From an operational impact perspective, this vulnerability enables local information disclosure that could expose sensitive communications, user data, or system messages containing confidential information. The attack surface is particularly concerning because it operates within the messaging infrastructure where critical business communications, authentication tokens, or system alerts may be stored. An attacker could potentially harvest credentials, session information, or business-critical messages that would otherwise remain protected. The exploitation process requires minimal effort and can be automated, making it attractive to threat actors seeking to gather intelligence or compromise system security. This vulnerability directly violates the security principle that information should only be accessible to authorized entities with proper clearance levels.
Mitigation strategies for CVE-2023-40649 should focus on implementing robust permission checking mechanisms within the messaging system. The most effective approach involves adding comprehensive access control validation at all message retrieval points, ensuring that each access request is authenticated and authorized before any data is returned. System administrators should implement proper role-based access controls that restrict message access based on user roles, group memberships, or specific authorization tokens. Additionally, regular security audits should verify that all messaging components properly enforce access controls and that no unauthorized data exposure pathways exist. The solution aligns with ATT&CK technique T1074 which involves data staging through local system information gathering, making it crucial to prevent unauthorized access to sensitive information within the messaging subsystem. Organizations should also consider implementing monitoring solutions that can detect unusual access patterns or unauthorized attempts to retrieve messages, providing additional layers of defense against exploitation of this vulnerability.