CWE
59 552
Advisory Published
Updated

CVE-2022-45440

First published: Tue Jan 17 2023(Updated: )

A vulnerability exists in the FTP server of the Zyxel AX7501-B0 firmware prior to V5.17(ABPC.3)C0, which processes symbolic links on external storage media. A local authenticated attacker with administrator privileges could abuse this vulnerability to access the root file system by creating a symbolic link on external storage media, such as a USB flash drive, and then logging into the FTP server on a vulnerable device.

Credit: security@zyxel.com.tw

Affected SoftwareAffected VersionHow to fix
Zyxel AX7501-B0 firmware<5.17\(abpc.3\)c0
Zyxel AX7501-B0

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Frequently Asked Questions

  • What is the vulnerability ID of this FTP server vulnerability?

    The vulnerability ID is CVE-2022-45440.

  • What is the severity of CVE-2022-45440?

    The severity of CVE-2022-45440 is medium with a CVSS score of 4.4.

  • How does the vulnerability in the Zyxel AX7501-B0 firmware FTP server affect the system?

    The vulnerability allows a local authenticated attacker with administrator privileges to access the root file system by creating symbolic links on external storage media.

  • Is the Zyxel AX7501-B0 firmware version prior to V5.17(ABPC.3)C0 affected by this vulnerability?

    Yes, the Zyxel AX7501-B0 firmware version prior to V5.17(ABPC.3)C0 is affected by this vulnerability.

  • How can an attacker exploit this vulnerability?

    An attacker with administrator privileges can abuse the vulnerability to access the root file system by creating symbolic links on external storage media.

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