CVE-2023-40643 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-2023-40643 resides within the messaging component of a software system, representing a critical permission validation flaw that compromises information security. This issue manifests as a missing permission check that allows unauthorized local access to sensitive information, fundamentally undermining the system's access control mechanisms. The vulnerability operates at the application level where proper authorization controls should prevent unauthorized data access but fail to enforce these restrictions effectively.
The technical implementation flaw stems from inadequate input validation and access control enforcement within the messaging subsystem. When the system processes messages or handles communication protocols, it fails to verify whether the requesting entity possesses appropriate permissions to access specific data resources. This missing validation creates a pathway for local attackers to bypass normal security boundaries and extract confidential information without requiring additional privileges or elevated execution rights. The vulnerability operates on the principle that legitimate users should not be able to access data beyond their authorized scope, yet this control mechanism is absent or improperly implemented.
From an operational perspective, this vulnerability presents a significant risk to data confidentiality and system integrity. Local information disclosure can result in exposure of sensitive communications, user credentials, system configurations, or other proprietary data that should remain protected. The attack vector requires minimal privileges since no additional execution privileges are needed to exploit the vulnerability, making it particularly dangerous as it can be leveraged by any local user or process with basic system access. This type of vulnerability aligns with CWE-284, which specifically addresses improper access control issues, and represents a direct violation of the principle of least privilege that security architectures should enforce.
The impact of this vulnerability extends beyond simple data exposure, as it can facilitate further exploitation attempts and potentially enable attackers to gather intelligence for more sophisticated attacks. An attacker could use the disclosed information to identify system weaknesses, map network topology, or discover additional vulnerabilities that could lead to privilege escalation or lateral movement within the system. This vulnerability also aligns with ATT&CK technique T1005, which involves data from local system storage, and demonstrates how missing permission checks can create persistent access vectors for threat actors.
Mitigation strategies for CVE-2023-40643 should focus on implementing comprehensive access control mechanisms throughout the messaging component. Organizations must ensure that all message processing operations include proper permission verification before data access is granted, implementing robust authentication and authorization checks at every interaction point. The fix should involve adding explicit permission validation routines that verify user credentials and access levels against defined security policies before allowing information disclosure. Additionally, regular security audits and code reviews should be conducted to identify similar permission validation gaps across the system. System administrators should also implement monitoring solutions to detect unauthorized access attempts and ensure that proper logging mechanisms are in place to track access patterns and potential exploitation attempts. The remediation process should follow security best practices including principle of least privilege enforcement, regular vulnerability assessments, and maintaining up-to-date security patches across all system components to prevent similar issues from emerging in the future.