#VU88555 Out-of-bounds write in AC9 Router AC1200 Smart Dual-Band Gigabit WiFi Router - CVE-2023-41560

Vulnerability identifier: #VU88555

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-41560

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
AC9 Router AC1200 Smart Dual-Band Gigabit WiFi Router
Hardware solutions / Routers for home users

Vendor: Shenzhen Tenda Technology Co.,Ltd.

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to stack overflow via parameter firewallEn at url /goform/SetFirewallCfg.. A remote attacker can create a specially crafted file, trick the victim into opening it using the affected software, trigger an out-of-bounds write and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

AC9 Router AC1200 Smart Dual-Band Gigabit WiFi Router: 15.03.06.42

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External links
https://github.com/peris-navince/founded-0-days/blob/main/formSetFirewallCfg/1.md

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.