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Zyxel has released patches addressing critical command injection and remote code execution vulnerabilities in two of its NAS products, NAS326 and NAS542, which have reached end-of-vulnerability support.
Users are strongly advised to install these patches to ensure optimal protection.
This command injection vulnerability in the CGI program “remote_help-cgi” in Zyxel NAS326 and NAS542 devices could allow an unauthenticated attacker to execute some operating system (OS) commands by sending a crafted HTTP POST request.
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This command injection vulnerability in the “setCookie” parameter in Zyxel NAS326 and NAS542 devices could allow an unauthenticated attacker to execute some OS commands by sending a crafted HTTP POST request.
This remote code execution vulnerability in the CGI program “file_upload-cgi” in Zyxel NAS326 and NAS542 devices could allow an unauthenticated attacker to execute arbitrary code by uploading a crafted configuration file to a vulnerable device.
This improper privilege management vulnerability in the SUID executable binary in Zyxel NAS326 and NAS542 devices could allow an authenticated local attacker with administrator privileges to execute some system commands as the “root” user on a vulnerable device.
This improper privilege management vulnerability in the command “show_allsessions” in Zyxel NAS326 and NAS542 devices could allow an authenticated attacker to obtain a logged-in administrator’s session information containing cookies on an affected device.
Due to the critical severity of vulnerabilities CVE-2024-29972, CVE-2024-29973, and CVE-2024-29974, Zyxel has made patches available to customers with extended support despite the products already having reached end-of-vulnerability support.
| Affected Model | Affected Version | Patch Availability |
| NAS326 | V5.21(AAZF.16)C0 and earlier | V5.21(AAZF.17)C0 |
| NAS542 | V5.21(ABAG.13)C0 and earlier | V5.21(ABAG.14)C0 |
*Both NAS326 and NAS542 reached end-of-vulnerability-support on Dec. 31, 2023.
Zyxel’s proactive approach in releasing patches for these critical vulnerabilities, even after the end-of-vulnerability-support period, underscores the importance of maintaining security for all users.
Users of the affected NAS devices must apply these patches immediately to safeguard their systems from potential attacks.
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