Vulnerability identifier: #VU11222

Vulnerability risk: High

CVSSv3.1: 8.9 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2017-12754

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
AsusWRT
Hardware solutions / Firmware

Vendor: Asus

Description

The vulnerability allows a remote authenticated attacker to execute arbitrary code on the target system.

The weakness exists in the httpd daemon due to improper processing of crafted HTTP GET request packets. A remote attacker can send a specially crafted HTTP GET request that contains a long delete_offline_client parameter, trigger a stack-based buffer overflow and execute arbitrary code.

Mitigation
Install update from vendor's website.

Vulnerable software versions

AsusWRT: 380.60 - 380.68

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External links
http://asuswrt.lostrealm.ca/changelog

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.