SB2018042005 - Remote code execution in DrayTek VigorACS

Description

This security bulletin contains information about 1 vulnerability.

1) Deserializatoin of untrusted data (CVE-ID: CVE-2017-5641)

CWE-ID: CWE-502 - Deserialization of Untrusted Data

CVSSv4: 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

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

The vulnerability exists due to the use of BlazeDS to process AMF3 messages within Customer Experience Improvement Program (CEIP) functionality. A remote attacker can execute arbitrary code on the target system when deserializing an untrusted Java object.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Remediation

Install update from vendor's website.

References

• https://blogs.securiteam.com/index.php/archives/3681
• https://github.com/pedrib/PoC/blob/master/exploits/acsPwn/acsPwn.rb