Remote code execution in Asus routers

1) Stack-based buffer overflow

EUVDB-ID: #VU11222

Risk: High

CVSSv4.0: 7.4 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2017-12754

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

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

CPE2.3

• cpe:2.3:h:asus:asuswrt:380.60:*:*:*:*:*:*:*
• cpe:2.3:h:asus:asuswrt:380.61:*:*:*:*:*:*:*
• cpe:2.3:h:asus:asuswrt:380.62:*:*:*:*:*:*:*

External links

https://asuswrt.lostrealm.ca/changelog

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.