CVE-2026-82120 in HiRDB Server
Summary
by MITRE • 10/27/2026
Heap-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 vulnerability identified in the HiRDB database management system represents a critical heap-based buffer overflow condition that poses significant risks to data integrity and system availability. This flaw exists within multiple versions of the HiRDB Server, specifically affecting Version 10 prior to build 10-12-01, as well as various iterations of Version 9 including standard releases from 09-00 through 09-66-22 and specialized variants such as those with additional functions or 32-bit architectures. The presence of this vulnerability across a wide range of legacy and current versions indicates a systemic issue in how the database engine handles memory allocation for incoming data structures, particularly when processing complex queries or large transaction payloads that exceed expected buffer boundaries.
From a technical perspective, heap-based buffer overflows occur when a program writes more data to a dynamically allocated block of memory on the heap than it was intended to hold. In the context of HiRDB, this likely stems from insufficient bounds checking during the parsing or execution phases of database operations. When an attacker crafts a malicious input that exceeds the allocated size for a specific buffer, the excess data overwrites adjacent memory locations. This corruption can alter control flow variables, function pointers, or other critical metadata stored on the heap. Such manipulation allows for arbitrary code execution with the privileges of the HiRDB service process, which typically runs with high-level system access to manage database files and handle network connections.
The operational impact of this vulnerability is severe, as it enables remote attackers to execute arbitrary commands on the underlying host operating system without requiring authentication in certain configurations or by exploiting authenticated sessions if local privilege escalation paths exist. This can lead to a complete compromise of the database server, resulting in unauthorized access to sensitive corporate data, modification or deletion of critical records, and potential pivoting into other parts of the internal network. Furthermore, heap corruption often leads to application crashes, causing denial-of-service conditions that disrupt business continuity for organizations relying on HiRDB for their core transactional processing needs.
This vulnerability aligns with Common Weakness Enumeration (CWE) category CWE-120, which describes buffer copy without checking size limits, and specifically falls under the sub-category of heap-based overflows where dynamic memory management is involved. In terms of offensive security frameworks, this flaw facilitates techniques associated with MITRE ATT&CK Tactic TA0004, Privilege Escalation, particularly through methods like Heap Spraying or exploitation of corrupted pointers to gain higher-level access. It also relates to initial compromise vectors involving injection attacks if the overflow is triggered via SQL input that bypasses standard sanitization routines due to memory handling errors rather than logical flaws alone.
Mitigation strategies must prioritize immediate patching by upgrading HiRDB Server versions to those released after 10-12-01 for Version 10 and post-09-66-22 or /V variants for Version 9, as these updates contain the necessary code fixes to enforce strict buffer size validation. For environments where immediate patching is not feasible due to compatibility constraints with legacy applications, network segmentation should be implemented to restrict access to HiRDB ports exclusively from trusted application servers and management stations. Additionally, deploying intrusion detection systems configured to detect anomalous memory allocation patterns or oversized SQL payloads can provide an additional layer of defense against exploitation attempts while the infrastructure migration plan is executed.