CVE-2017-8850 Security feature bypass in n/a
Attackers can bypass bootloader locks to install mismatched OS images via insecure OTA updates, enabling exploitation of patched vulnerabilities.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-8850?
CVE-2017-8850 is a medium-severity vulnerability in n/a, published on 11 May 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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).
Weakness: CWE-319
Which versions are affected by CVE-2017-8850?
It affects 1 product.
Products include Oneplus Oxygenos.
How do I fix CVE-2017-8850?
No fix has been published for CVE-2017-8850 yet. Limit exposure of the affected software until one is available.
Is CVE-2017-8850 being exploited?
There is no known exploitation of CVE-2017-8850 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-84h2-3vmh-4gmw.