Description

IBM Db2 Mirror for i 7.4, 7.5, and 7.6 could allow a remote attacker to execute arbitrary CL commands due to improper neutralization of special elements in a command.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "9.9",
  "pubDate": "2026-08-14T20:16:51.127Z",
  "pubdate": "2026-08-14T20:16:51.127Z",
  "executiveSummary": "A command injection vulnerability exists in IBM Db2 Mirror for i versions 7.4, 7.5, and 7.6. The flaw arises from the improper neutralization of special elements within command strings processed by the application. This security deficiency allows a remote attacker to execute arbitrary Control Language (CL) commands on the underlying operating system.\nThe risk implications are severe, as successful exploitation could grant unauthorized remote attackers the ability to execute arbitrary system-level commands with the privileges of the vulnerable service. This compromises the confidentiality, integrity, and availability of the affected IBM i environment. The attack vector requires network connectivity to the target system and exploits input validation weaknesses without inherently demanding complex pre-existing authentication or elevated privileges, depending on the specific network exposure of the service.\nOrganizations utilizing the affected IBM Db2 Mirror for i versions face elevated exposure to remote system compromise if appropriate compensating controls or vendor-supplied updates are not applied.",
  "technicalDetails": "The root cause of the vulnerability is rooted in insufficient input validation and improper sanitization of special characters within command processing routines inside IBM Db2 Mirror for i. When user-supplied data or network-derived parameters are incorporated into Control Language (CL) command strings without adequate neutralization, an attacker can inject malicious command metacharacters.\nThe vulnerable component handles remote requests and constructs operating system commands dynamically. Due to the lack of strict parameterization or robust escaping mechanisms, the command interpreter parses the injected special elements as legitimate syntax, altering the intended execution logic of the original command structure.\nThe attack flow proceeds as follows: First, a remote attacker crafts a specialized payload containing malicious CL command syntax designed to bypass the input filters of IBM Db2 Mirror for i. Second, the attacker transmits this payload over the network to the vulnerable target service. Third, the receiving component processes the input and concatenates it into a command string destined for the operating system shell or command processor. Fourth, due to improper neutralization of special elements, the command processor interprets the injected payload as executable commands rather than literal data. Finally, the operating system executes the arbitrary CL commands, resulting in unauthorized command execution.\nAffected versions of the software include IBM Db2 Mirror for i 7.4, 7.5, and 7.6. Exploitation operates via network exposure, allowing a remote adversary to interact with the vulnerable service. Post-exploitation impact includes full system compromise, unauthorized data access, system modification, or denial of service, dictated by the execution privileges associated with the vulnerable service context."
}