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Vulnerability Details : CVE-2018-11518

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).
Publish Date : 2018-05-30 Last Update Date : 2018-07-20
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- CVSS Scores & Vulnerability Types

CVSS Score
6.8
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s)
CWE ID 20

- Products Affected By CVE-2018-11518

# Product Type Vendor Product Version Update Edition Language
1 OS Hcltech Legacy Ivr Firmware - Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Hcltech Legacy Ivr Firmware 1

- References For CVE-2018-11518

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

- Vulnerability Conditions

Vulnerability is valid if product versions listed below are used TOGETHER WITH(AND)

- Metasploit Modules Related To CVE-2018-11518

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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