Vulnerability Description
An issue was discovered on OnePlus One, X, 2, 3, and 3T devices. Due to a lenient updater-script in the OnePlus OTA images, and the fact that both ROMs use the same OTA verification keys, attackers can install HydrogenOS over OxygenOS and vice versa, even on locked bootloaders, which allows for exploitation of vulnerabilities patched on one image but not on the other, in addition to expansion of the attack surface. 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 (on OnePlus 3/3T 'Secure Start-up' must be off).
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Oneplus | Oxygenos | All versions |
| Oneplus | Oneplus 2 | - |
| Oneplus | Oneplus 3 | - |
| Oneplus | Oneplus 3T | - |
| Oneplus | Oneplus One | - |
| Oneplus | Oneplus X | - |
Related Weaknesses (CWE)
References
- https://alephsecurity.com/vulns/aleph-2017020ExploitIssue TrackingThird Party Advisory
- https://alephsecurity.com/vulns/aleph-2017020ExploitIssue TrackingThird Party Advisory
FAQ
What is CVE-2017-8850?
CVE-2017-8850 is a vulnerability with a CVSS score of 5.9 (MEDIUM). An issue was discovered on OnePlus One, X, 2, 3, and 3T devices. Due to a lenient updater-script in the OnePlus OTA images, and the fact that both ROMs use the same OTA verification keys, attackers ca...
How severe is CVE-2017-8850?
CVE-2017-8850 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-2017-8850?
Check the references section above for vendor advisories and patch information. Affected products include: Oneplus Oxygenos, Oneplus Oneplus 2, Oneplus Oneplus 3, Oneplus Oneplus 3T, Oneplus Oneplus One.