CVE-2026-82118 in HiRDB Server
Summary
by MITRE • 10/27/2026
Stack-based Buffer Overflow Vulnerability in HiRDB.
This issue affects HiRDB Server Version 10: from 10-00 before 10-12-01; HiRDB Server Version 9: from 09-00 through 09-66-22; HiRDB Server with Additional Function Version 9: from 09-00 through 09-66/V; HiRDB Server Version 9(32): from 09-02 through 09-66-22; HiRDB Server with Additional Function Version 9(32): from 09-00 through 09-66-/V.
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Analysis
by VulDB Data Team • 10/27/2026
The identified vulnerability represents a critical stack-based buffer overflow within the HiRDB database management system, affecting multiple legacy and current server versions including version 10 prior to patch level 12-01 and various iterations of version 9 up through specific maintenance releases. This flaw stems from improper bounds checking when handling input data destined for internal buffers allocated on the call stack. In a typical execution flow, user-supplied or network-received data is copied into a fixed-size buffer without verifying that the length of the incoming payload does not exceed the allocated memory space. When an attacker crafts a request with excessively long fields or specially formatted packets, the excess data overwrites adjacent memory locations on the stack, including critical control structures such as return addresses and saved frame pointers. This corruption allows for arbitrary code execution by redirecting the program counter to malicious shellcode injected into the overflowed buffer or leveraging existing executable memory regions through techniques like Return Oriented Programming if direct injection is mitigated by modern operating system protections.
From a technical perspective, this vulnerability aligns with Common Weakness Enumeration identifier CWE-121, which specifically denotes stack-based buffer overflows resulting from insufficient validation of input lengths before copying data into fixed-size buffers on the call stack. The operational impact is severe, as successful exploitation grants an attacker full control over the underlying operating system processes running the HiRDB service. This can lead to complete compromise of database integrity, confidentiality, and availability. Attackers may extract sensitive financial or proprietary data stored within the relational databases managed by HiRDB, modify records to facilitate fraud or sabotage, or use the compromised server as a pivot point for lateral movement within the corporate network. Furthermore, because this is a stack-based overflow, it often allows for remote code execution without authentication if the vulnerable function is exposed via network services, making it particularly dangerous in internet-facing deployments or poorly segmented internal networks.
The attack vector associated with this flaw corresponds to MITRE ATT&CK technique T1203, which covers Exploitation for Client Execution, and potentially T1059 Command and Scripting Interpreter if the attacker utilizes the compromised environment to execute further commands. The vulnerability persists across a wide range of versions because older codebases often lack modern memory safety features such as stack canaries or Address Space Layout Randomization enforcement at the application level. Organizations relying on HiRDB for critical infrastructure must recognize that this is not merely an information disclosure issue but a direct path to system takeover. The breadth of affected versions indicates a systemic design flaw in how input validation was implemented across different product lines and 32-bit versus 64-bit architectures, suggesting that the root cause lies deep within core database engine functions rather than isolated modules.
Mitigation strategies must prioritize immediate patching according to vendor guidelines for all listed version ranges. For HiRDB Server Version 10, upgrading to or beyond release 10-12-01 is essential to resolve the buffer handling logic errors. Similarly, administrators running any variant of Version 9 from 09-00 through the specified upper bounds must apply the latest available security patches that address these specific overflow conditions. In environments where immediate patching is not feasible due to operational constraints or compatibility concerns with legacy applications relying on HiRDB, network-level controls should be implemented as compensating measures. This includes restricting access to database ports using strict firewall rules and deploying Intrusion Prevention Systems configured to detect buffer overflow signatures associated with malformed SQL queries or protocol requests targeting the vulnerable functions. Additionally, enabling operating system-level protections such as Data Execution Prevention and Address Space Layout Randomization can reduce the likelihood of successful exploitation by making it harder for attackers to predict memory layouts and execute injected code. Long-term remediation should involve architectural reviews to replace legacy database systems with modern alternatives that enforce strict input validation and utilize safer programming languages or frameworks designed to prevent stack-based corruption automatically.