Out-of-bounds write in Asuswrt-Merlin New Gen - CVE-2022-26376

Vulnerability identifier: #VU65842

CSH Severity: High

CVSS v4: 9.3 [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]

CVE-ID: CVE-2022-26376

CWE-ID: CWE-787

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error in the httpd unescape functionality. A remote attacker can trigger out-of-bounds write and execute arbitrary code on the target system.

Asuswrt-Merlin New Gen
GS-AX3000
GT-AXE16000
GS-AX5400
GT6
TUF-AX5400
RT-AX82U
RT-AX86S
RT-AX86U
RT-AX86U PRO
ZenWiFi XT8_V2
ZenWiFi XT8
ZenWiFi XT9
GT-AX11000
GT-AX6000
GT-AXE11000 PRO
RT-AX58U
RT-AX3000
GT-AXE11000
TUF-AX6000

Install updates from vendor's website.

Asuswrt-Merlin New Gen - update to 386.7
GS-AX3000 - update to 1.4.8.3
GT-AXE16000 - update to 3.0.0.4.388.23012
GS-AX5400 - update to 3.0.0.4.388.23012
GT6 - update to 3.0.0.4.388.23145
TUF-AX5400 - update to 3.0.0.4.388.23285
RT-AX82U - update to 3.0.0.4.388.23285
RT-AX86S - update to 3.0.0.4.388.23285
RT-AX86U - update to 3.0.0.4.388.23285
RT-AX86U PRO - update to 3.0.0.4.388.23285
ZenWiFi XT8_V2 - update to 3.0.0.4.388.23285
ZenWiFi XT8 - update to 3.0.0.4.388.23285
ZenWiFi XT9 - update to 3.0.0.4.388.23285
GT-AX11000 - update to 3.0.0.4.388.23285
GT-AX6000 - update to 3.0.0.4.388.23285
GT-AXE11000 PRO - update to 3.0.0.4.388.23285
RT-AX58U - update to 3.0.0.4.388.23403
RT-AX3000 - update to 3.0.0.4.388.23403
GT-AXE11000 - update to 3.0.0.4.388.23482
TUF-AX6000 - update to 3.0.0.4.388.31927

• https://www.talosintelligence.com/vulnerability_reports/TALOS-2022-1511

• Out-of-bounds write in Asuswrt-Merlin New Gen
• Multiple vulnerabilities in ASUS Routers