Vulnerability Description
An issue was discovered on OnePlus One and X devices. Due to a lenient updater-script on the OnePlus One and X OTA images, the fact that both products use the same OTA verification keys, and the fact that both products share the same 'ro.build.product' system property, attackers can install OTAs of one product over the other, even on locked bootloaders. That could theoretically allow for exploitation of vulnerabilities patched on one image but not on the other, in addition to expansion of the attack surface. Moreover, the vulnerability may result in having the device unusable until a Factory Reset is performed. This vulnerability can be exploited by Man-in-the-Middle (MiTM) attackers targeting the update process. This is possible because the update transaction does not occur over TLS (CVE-2016-10370). In addition, physical attackers can reboot the phone into recovery, and then use 'adb sideload' to push the OTA.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Oneplus | Oxygenos | All versions |
| Oneplus | Oneplus One | - |
| Oneplus | Oneplus X | - |
Related Weaknesses (CWE)
References
- https://alephsecurity.com/vulns/aleph-2017021ExploitTechnical DescriptionThird Party Advisory
- https://alephsecurity.com/vulns/aleph-2017021ExploitTechnical DescriptionThird Party Advisory
FAQ
What is CVE-2017-8851?
CVE-2017-8851 is a vulnerability with a CVSS score of 5.9 (MEDIUM). An issue was discovered on OnePlus One and X devices. Due to a lenient updater-script on the OnePlus One and X OTA images, the fact that both products use the same OTA verification keys, and the fact ...
How severe is CVE-2017-8851?
CVE-2017-8851 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2017-8851?
Check the references section above for vendor advisories and patch information. Affected products include: Oneplus Oxygenos, Oneplus Oneplus One, Oneplus Oneplus X.