CVE-2018-11518

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Summary

CVECVE-2018-11518
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2018-05-30 20:29:00 UTC
Updated2018-07-20 16:10:00 UTC
DescriptionA 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).

Risk And Classification

Problem Types: CWE-20

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Hcltech Legacy Ivr - All All All
Hardware Hcltech Legacy Ivr - All All All
Operating System Hcltech Legacy Ivr Firmware - All All All
Operating System Hcltech Legacy Ivr Firmware - All All All

References

ReferenceSourceLinkTags
Dhiraj 的 Twitter: “The IVR nowadays includes multiple functionalities like recharges and subscriptions for services which can also be done even with modern Telecom operators. #DiggingOldSys… https://t.co/QBdbZUiEli” MISC twitter.com Third Party Advisory
A Virgil's Guide to Pentest: 0day - Legacy IVR - Let's Phreak MISC virgil-cj.blogspot.com Third Party Advisory
Abusing IVR Systems - Legacy Telecom [CVE-2018-11518] ~ inputzero MISC datarift.blogspot.com Third Party Advisory
Dhiraj op Twitter: "Yes there is no boundry crossing here and it does follow the flow but the flow is controlled by someone else not the user who has initiated the call. Select 1 for English is just an example to show we can control other users flow without their consent. 1/n… https://t.co/rTME60EolO" MISC twitter.com Third Party Advisory
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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