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A memory disclosure vulnerability was found in PostgreSQL that allows remote users to access sensitive information by exploiting certain aggregate function calls with 'unknown'-type arguments. Handling 'unknown'-type values from string literals without type designation can disclose bytes, potentially revealing notable and confidential information. This issue exists due to excessive data output in aggregate function calls, enabling remote users to read some portion of system memory.

CVE-2023-5868 is a vulnerability identified in Red Hat Advanced Cluster Security 4.2 that stems from a memory disclosure issue in PostgreSQL's handling of aggregate function calls with 'unknown'-type arguments. Specifically, when aggregate functions process string literals without explicit type designation, the system may output excessive data, inadvertently disclosing bytes from system memory. This vulnerability arises because PostgreSQL treats 'unknown'-type arguments in a way that can cause memory beyond the intended data to be read and returned, potentially revealing sensitive information stored in memory buffers. The flaw allows remote attackers with low privileges to execute crafted queries that exploit this behavior, gaining unauthorized access to confidential data. The vulnerability impacts confidentiality but does not affect data integrity or system availability. The CVSS 3.1 base score is 4.3, reflecting medium severity, with attack vector network-based, low attack complexity, requiring privileges but no user interaction. No known exploits have been reported in the wild as of the publication date. The vulnerability is particularly relevant in environments where Red Hat Advanced Cluster Security is deployed to protect containerized workloads that rely on PostgreSQL databases, as attackers could leverage this flaw to extract sensitive information from memory, potentially including credentials or other secrets. The root cause lies in PostgreSQL's aggregate function implementation and its handling of 'unknown' data types, which Red Hat Advanced Cluster Security inherits or interacts with. Remediation involves applying patches from Red Hat once available and implementing strict input validation and monitoring to detect anomalous query patterns that may indicate exploitation attempts.

Detailed information about CVE-2023-5868: Function Call With Incorrect Argument Type in Red Hat Red Hat Advanced Cluster Security 4.2 affecting Red Hat Red Hat 

CVE-2023-5868: Function Call With Incorrect Argument Type in Red Hat Red Hat Advanced Cluster Security 4.2 - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2023-5868: Function Call With Incorrect Argument Type in Red Hat Red Hat Advanced Cluster Security 4.2

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