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CableTap/doc/advisories/bastille-42.remote-OTA.txt
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| Bastille Tracking Number 42 | |
| CVE-2017-9498 | |
| Overview | |
| With root access on a Motorola MX011ANM set-top box, an attacker can push arbitrary firmware updates to XR11 remotes. | |
| Affected Platforms: | |
| - Motorola MX011ANM, firmware version MX011AN_2.9p6s1_PROD_sey | |
| - Xfinity XR11-20 Voice Remote | |
| Proof-of-Concept | |
| An attacker can modify known files to upload an arbitrary firmware image to a target XR11 remote. | |
| Test Environment: | |
| - Motorola MX011ANM, firmware version MX011AN_2.9p6s1_PROD_sey | |
| - Xfinity XR11-20 Voice Remote, firmware version 1.0.1.0 | |
| Mitigation | |
| There is no apparent mechanism to allow Comcast customers to change this behavior. | |
| Recommended Remediation | |
| Use cryptographically signed firmware images that are checked on both the set-top box and remote. | |
| Credits | |
| Marc Newlin and Logan Lamb, Bastille | |
| Chris Grayson, Web Sight.IO |