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CVE-2016-1518

Status Candidate

Overview

The auto-provisioning mechanism in the Grandstream Wave app 1.0.1.26 and earlier for Android and Grandstream Video IP phones allows man-in-the-middle attackers to spoof provisioning data and consequently modify device functionality, obtain sensitive information from system logs, and have unspecified other impact by leveraging failure to use an HTTPS session for downloading configuration files from http://fm.grandstream.com/gs/.

Related Files

Grandstream Wave 1.0.1.26 TLS Man-In-The-Middle
Posted Mar 18, 2016
Authored by Georg Lukas

Grandstream VoIP products deploy a remote provisioning mechanism that allows to automatically set configuration elements on app startup. By default, an insecure connection to `fm.grandstream.com` is used to obtain the provisioning profile. However, even if an HTTPS URL is configured, the certificate is not validated, allowing an active attacker to successfully impersonate the provisioning server with an invalid, mismatching or outdated certificate.

tags | advisory, remote, web
advisories | CVE-2016-1518, CVE-2016-1519
MD5 | 5f11124583995357d0dc0783c683643c
Grandstream Wave 1.0.1.26 Man-In-The-Middle
Posted Mar 17, 2016
Authored by Georg Lukas

The Grandstream VoIP products deploy a remote provisioning mechanism that allows to automatically set configuration elements on phone/app startup. By default, an insecure connection to `fm.grandstream.com` is used to obtain the provisioning profile. An active attacker can redirect this request and change arbitrary values of the configuration. This allows to redirect phone calls through a malicious server, turn the phone into a bug, change passwords, and exfiltrate system logs (including the phone numbers dialed by the user).

tags | advisory, remote, arbitrary
advisories | CVE-2016-1518
MD5 | bae9a0ebba1ee3cef010efe0194b2c22
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