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Wednesday, December 13, 2023

A number of Vital Flaws Discovered In Zyxel NAS Units


Zyxel NAS customers should rush to replace their gadgets on the earliest because the distributors have patched quite a few safety flaws. Exploiting these vulnerabilities may permit extreme threats from unauthorized customers.

Zyxel NAS Units Exhibited Quite a few Safety Flaws

In response to a current advisory, Zyxel disclosed patching a number of safety flaws affecting its NAS gadgets. Particularly, the seller addressed six completely different vulnerabilities, together with three critical-severity points that would threat the gadgets’ safety. These embody,

  • CVE-2023-35137: An improper authentication vulnerability within the authentication module allowed an unauthenticated adversary to entry system info. Exploiting the flaw required the attacker to ship a maliciously crafted URL to the goal gadget.
  • CVE-2023-35138: A command injection vulnerability within the show_zysync_server_contents perform. An unauthenticated adversary may execute working system (OS) instructions on the goal gadget by sending a maliciously crafted HTTP POST request.
  • CVE-2023-37927: This vulnerability may permit OS command execution to an authenticated attacker. The flaw existed on account of improper neutralization of particular parts within the CGI program in NAS gadgets.
  • CVE-2023-37928: A command injection vulnerability within the WSGI server permitting OS command execution assaults from an authenticated adversary.
  • CVE-2023-4473: A command injection vulnerability within the Zyxel NAS net server permitting OS command execution from an unauthenticated attacker.
  • CVE-2023-4474: The improper neutralization of particular parts within the Zyxel NAS WSGI server may permit OS command execution from an unauthenticated attacker.

Zyxel acknowledged the researchers Maxim Suslov, Gábor Selján from BugProve, and Drew Balfour from IBM X-Pressure for individually discovering and reporting these vulnerabilities.

Concerning the susceptible gadgets, these vulnerabilities affected the Zyxel NAS326 V5.21(AAZF.14)C0 and earlier, and NAS542 V5.21(ABAG.11)C0 and earlier. Following the bug stories, the seller patched the vulnerabilities with Zyxel NAS326 V5.21(AAZF.15)C0 and NAS542 V5.21(ABAG.12)C0. Therefore, to keep away from potential dangers, customers should replace their susceptible NAS gadgets to the most recent firmware releases to obtain the patches.

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