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CVE-2026-17424 is a path traversal vulnerability affecting IBM AIX versions 7.2 and 7.3, as well as IBM PowerVM Virtual I/O Server (VIOS) version 4.1. The flaw allows a remote attacker to bypass security restrictions due to improper limitation of a pathname to a restricted directory. This vulnerability is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory (‘Path Traversal’).
The root cause lies in how the affected components handle string inputs that specify file locations. In secure systems design, applications must strictly validate user-supplied input to ensure it does not contain sequences designed to escape the intended sandboxed environment. The flaw in these IBM platforms indicates that the underlying mechanisms responsible for restricting file system access failed to adequately sanitize or canonicalize paths before processing them. This allows an attacker to construct maliciously crafted requests containing relative path indicators, such as dot-dot-slash sequences (../), which can navigate up the directory hierarchy from a restricted location into broader areas of the file system where sensitive data resides. When an application or system service receives a path argument without rigorous validation against absolute paths or proper normalization, it may interpret relative navigation commands literally rather than resolving them strictly within the allowed context. This lack of strict enforcement enables unauthorized entities to read configuration files, access private keys, view proprietary source code, or potentially overwrite critical system binaries depending on the privileges associated with the vulnerable process. The severity is compounded by the fact that this can be exploited remotely if the affected service exposes a network-facing interface that accepts file path parameters without sufficient sanitization checks. The exploitation typically requires a remote attacker with network connectivity to the target service but does not necessarily require prior authentication if the vulnerable endpoint is publicly accessible.
DailyCVE Form:
Platform: IBM AIX/PowerVM VIOS
Version: 7.2,7.3,4.1
Vulnerability: Path Traversal
Severity: MEDIUM
Date: 08/20/2026
Prediction: Patch by 09/2026
What Undercode Say:
Check if your AIX or VIOS system is affected by verifying the installed version:
oslevel -s lslpp -L | grep -i vios
Monitor for suspicious path traversal attempts in system logs:
grep -i ".." /var/log/syslog
Review file access patterns for unauthorized reads of sensitive directories:
audit -o -f /etc/security/audit/config
Exploit: (Educational Purposes!)
An attacker could craft a malicious HTTP request or command injection to traverse directories:
GET /vulnerable/endpoint?file=../../../../etc/passwd HTTP/1.1
Attempt to read sensitive files via command injection:
curl -X GET "https://target/vulnerable/path?file=../../../etc/security/passwd"
Protection:
Apply the security patch provided by IBM as soon as it becomes available for AIX 7.2, 7.3, and PowerVM VIOS 4.1. The patch contains code changes that enforce stricter path validation rules, ensuring that all file access requests are properly sanitized and canonicalized. IBM has published a security advisory at `https://www.ibm.com/support/pages/node/7283858`.
Impact:
Successful exploitation allows an attacker to bypass security restrictions and gain unauthorized access to restricted directories. This could lead to reading configuration files, accessing private keys, viewing proprietary source code, or overwriting critical system binaries. If the vulnerable service runs with elevated privileges—common for system administration tools and virtualization management interfaces like PowerVM VIOS—successful exploitation could lead to full system compromise, including the ability to modify system configurations, install persistent backdoors, or disrupt availability by corrupting essential files. For IBM AIX environments often used in enterprise data centers, such a breach undermines the integrity of the entire infrastructure layer, potentially affecting downstream applications and services that rely on the security boundaries established by the operating system.
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Sources:
Reported By: nvd.nist.gov
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