National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2018-11518 Detail

Current Description

A vulnerability allows a phreaking attack on HCL legacy IVR systems that do not use VoIP. These IVR systems rely on various frequencies of audio signals; based on the frequency, certain commands and functions are processed. Since these frequencies are accepted within a phone call, an attacker can record these frequencies and use them for service activations. This is a request-forgery issue when the required series of DTMF signals for a service activation is predictable (e.g., the IVR system does not speak a nonce to the caller). In this case, the IVR system accepts an activation request from a less-secure channel (any loudspeaker in the caller's physical environment) without verifying that the request was intended (it matches a nonce sent over a more-secure channel to the caller's earpiece).

Source:  MITRE
Description Last Modified:  05/30/2018
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 8.1 HIGH
Vector: AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H (V3 legend)
Impact Score: 5.9
Exploitability Score: 2.2


Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 6.8 MEDIUM
Vector: (AV:N/AC:M/Au:N/C:P/I:P/A:P) (V2 legend)
Impact Subscore: 6.4
Exploitability Subscore: 8.6


Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): Partial
Availability (A): Partial
Additional Information:
Allows unauthorized disclosure of information
Allows unauthorized modification
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://virgil-cj.blogspot.com/2018/05/0day-legacy-ivr-lets-phreak.html Third Party Advisory
https://datarift.blogspot.com/2018/05/CVE-2018-11518-abusing-ivr-systems.html Third Party Advisory
https://twitter.com/mishradhiraj_/status/1001664204485652482 Third Party Advisory
https://twitter.com/mishradhiraj_/status/1001664440759091207 Third Party Advisory

Technical Details

Vulnerability Type (View All)

Change History

1 change record found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-11518
NVD Published Date:
05/30/2018
NVD Last Modified:
07/20/2018