Description

IBM Db2 Mirror for i 7.4, 7.5, and 7.6 could allow a remote authenticated attacker to cause a denial of service due to command injection.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "8.5",
  "pubDate": "2026-08-14T20:16:50.663Z",
  "pubdate": "2026-08-14T20:16:50.663Z",
  "executiveSummary": "This vulnerability involves a command injection security flaw within IBM Db2 Mirror for i, specifically impacting versions 7.4, 7.5, and 7.6. The weakness allows a remote authenticated attacker to execute arbitrary system commands via the affected interface.\nThe primary operational impact of successful exploitation is a denial of service condition, which can severely disrupt database replication and high-availability operations across the IBM i environment.\nExploitation of this vulnerability requires the attacker to possess remote authentication credentials to the target system. Interaction requirements and network exposure are inherent to the remote access capabilities of the database mirror management interface.\nRisk implications include potential operational downtime, loss of database availability, and compromised integrity of the Db2 Mirror environment. Organizations utilizing the affected software versions face significant availability risks if malicious inputs are processed by the vulnerable component without proper sanitization.",
  "technicalDetails": "The root cause of the vulnerability stems from insufficient input validation and improper sanitization of parameters passed to underlying system command execution functions within IBM Db2 Mirror for i.\nThe vulnerable component is responsible for processing administrative or operational commands related to the Db2 Mirror infrastructure. Because input is improperly filtered before being concatenated or passed to a command interpreter, an attacker can append malicious shell metacharacters and payloads.\nAffected versions include IBM Db2 Mirror for i 7.4, 7.5, and 7.6. The attack vector is network-based, requiring the adversary to have remote network access to the service.\nAuthentication requirements dictate that the attacker must be a remote authenticated user, meaning valid credentials or an active session within the scope of the application are mandatory to reach the vulnerable code path.\nThe step-by-step attack flow begins with the authenticated attacker crafting a malicious payload containing operating system command injection sequences. The attacker submits this payload through the vulnerable network protocol or interface interacting with IBM Db2 Mirror for i.\nUpon receiving the request, the vulnerable component fails to adequately validate or escape the input string. The unsanitized input is subsequently passed to the underlying operating system command shell for execution.\nThe payload behavior involves the execution of unintended system commands supplied by the attacker. In the context of this vulnerability, the execution leads directly to a denial of service state, crashing or hanging the target service or underlying database mirror processes.\nPost-exploitation impact is primarily concentrated on system availability disruption, terminating critical high-availability replication streams, and potentially requiring manual administrative intervention to restore normal database mirror operations."
}