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CVE-2017-8850

CVE information

Published

5 years ago

Last Modified

2 years ago

CVSSv2.0 Severity

Medium

CVSSv3.1 Severity

Medium

Impact Analysis

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)..

CVSSv2.0 Score

Severity
Medium
Base Score
4.3/10
Exploit Score
8.6/10
Access Vector
Network
Access Complexity
Medium
Authentication Required
None
Impact Score
2.9/10
Confidentiality Impact
None
Availability Impact
None
Integrity Impact
Partial

CVSSv3.1 Score

Severity
Medium
Base Score
5.9/10
Exploit Score
2.2/10
Access Vector
Network
Access Complexity
High
Privileges Required
None
Impact Score
3.6/10
Confidentiality Impact
None
Availability Impact
None
Integrity Impact
High
Scope
Unchanged
User Interaction
None

Products Affected

CPE Affected Vulnerable Excluding Edit
cpe:2.3:o:oneplus:oxygenos:*:*:*:*:*:*:*:*
  Yes
-
cpe:2.3:h:oneplus:oneplus_3:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:oneplus:oneplus_one:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:oneplus:oneplus_x:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:oneplus:oneplus_3t:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:oneplus:oneplus_2:-:*:*:*:*:*:*:*
  No
-