Denial of Service in IBM i via NULL Pointer Dereference

Executive Summary

This vulnerability is a denial of service issue in IBM i versions 7.6, 7.5, 7.4, and 7.3. It occurs when a remote authenticated attacker exploits a NULL pointer dereference, which can crash the system or disrupt services.

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Detection Guidance

This vulnerability is specific to IBM i systems and requires remote authentication to exploit. Detection may involve checking for unusual system crashes or NULL pointer dereference errors in logs. No direct commands are provided in the CVE details, but monitoring for application crashes or service disruptions on IBM i systems could indicate exploitation.

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Impact Analysis

If exploited, this vulnerability could cause system instability or unavailability, leading to service disruptions for users relying on IBM i systems. It requires an attacker to have valid authentication credentials.

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Compliance Impact

This vulnerability could lead to a denial of service due to a NULL pointer dereference, which may disrupt system availability. Such disruptions could impact compliance with standards requiring data availability, such as GDPR's requirement for timely data access or HIPAA's emphasis on system reliability for protected health information.

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Mitigation Strategies

Apply the latest IBM i PTF or update to a fixed release to address the NULL pointer dereference issue. Monitor IBM i security bulletins for patches and restrict remote authenticated access until patched.

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