CVE-2017-6094 Information

Description

CPEs used by subscribers on the access network receive their individual configuration settings from a central GAPS instance. A CPE identifies itself by the MAC address of its WAN interface and a certain \chk\ value (48bit) derived from the MAC. The algorithm used to compute the \chk\ was disclosed by reverse engineering the CPE’s firmware. As a result it is possible to forge valid \chk\ values for any given MAC address and therefore receive the configuration settings of other subscribers’ CPEs. The configuration settings often contain sensitive values for example credentials (username/password) for VoIP services. This issue affects Genexis B.V. GAPS up to 7.2.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

http://seclists.org/fulldisclosure/2017/Dec/62

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8