Security restrictions bypass in Asus AsusWRT

Published: 2018-01-26

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2018-5999 CVE-2018-6000
CWE-ID	CWE-20
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #1 is available. Public exploit code for vulnerability #2 is available.
Vulnerable software Subscribe	AsusWRT Hardware solutions / Firmware
Vendor	Asus

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Security restrictions bypass

EUVDB-ID: #VU10255

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:F/RL:O/RC:C]

CVE-ID: CVE-2018-5999

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The weakness exists due to a flaw in the handle_request function in router/httpd/httpd.c. A remote attacker can send a specially crafted HTTP POST request and bypass security restrictions.

Mitigation

Update to version 3.0.0.4.384_10007 or later.

Vulnerable software versions

AsusWRT: 3.0.0.4.380.7743

External links

http://blogs.securiteam.com/index.php/archives/3589

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. However, a fully functional exploit for this vulnerability is available.

2) Security restrictions bypass

EUVDB-ID: #VU10256