HomeVulnerabilityASUS routers susceptible to crucial distant code execution flaws

ASUS routers susceptible to crucial distant code execution flaws

Three critical-severity distant code execution vulnerabilities impression ASUS RT-AX55, RT-AX56U_V2, and RT-AC86U routers, doubtlessly permitting risk actors to hijack gadgets if security updates should not put in.

These three WiFi routers are widespread high-end fashions throughout the shopper networking market, presently out there on the ASUS web site, favored by players and customers with demanding efficiency wants.

The failings, which all have a CVSS v3.1 rating of 9.8 out of 10.0, are format string vulnerabilities that may be exploited remotely and with out authentication, doubtlessly permitting distant code execution, service interruptions, and performing arbitrary operations on the machine.

Format string flaws are security issues arising from unvalidated and/or unsanitized person enter throughout the format string parameters of sure features. They’ll result in numerous points, together with info disclosure and code execution.

Attackers exploit these flaws utilizing specifically crafted enter despatched to the susceptible gadgets. Within the case of the ASUS routers, they’d goal sure administrative API features on the gadgets.

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The failings

The three vulnerabilities that have been disclosed earlier as we speak by the Taiwanese CERT are the next:

  1. CVE-2023-39238: Lack of correct verification of the enter format string on the iperf-related API module ‘ser_iperf3_svr.cgi’.
  2. CVE-2023-39239: Lack of correct verification of the enter format string within the API of the final setting perform.
  3. CVE-2023-39240: Lack of correct verification of the enter format string on the iperf-related API module ‘ser_iperf3_cli.cgi’.

The above points impression ASUS RT-AX55, RT-AX56U_V2, and RT-AC86U in firmware variations 3.0.0.4.386_50460, 3.0.0.4.386_50460, and three.0.0.4_386_51529 respectively.

The really helpful resolution is to use the next firmware updates:

ASUS launched patches that tackle the three flaws in early August 2023 for RT-AX55, in Could 2023 for AX56U_V2, and in July 2023 for RT-AC86U.

Customers who haven’t utilized security updates since then ought to take into account their gadgets susceptible to assaults and prioritize the motion as quickly as potential.

Moreover, as many shopper router flaws goal the online admin console, it’s strongly suggested to show off the distant administration (WAN Net Entry) characteristic to forestall entry from the web.

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