Attacker Value
High
(1 user assessed)
Exploitability
Very High
(1 user assessed)
User Interaction
None
Privileges Required
Low
Attack Vector
Local
0

CVE-2016-10225

Disclosure Date: March 27, 2017 •
CVE-2016-10225 CVSS v3 Base Score: 7.8
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

The sunxi-debug driver in Allwinner 3.4 legacy kernel for H3, A83T and H8 devices allows local users to gain root privileges by sending “rootmydevice” to /proc/sunxi_debug/sunxi_debug.

Add Assessment

1
Ratings
  • Attacker Value
    High
  • Exploitability
    Very High
Easy to weaponizeGives privileged access
Technical Analysis

This vulnerability is unbelievably easy to trigger. The binary/process sunxi_debug was accidentally incorporated into kernel builds for Allwinner processors. Simply echoing ‘rootmydevice’ to the process /proc/sunxi_debug/sunxi_debug would elevate the shell to root. Beyond simple, trivial to code, absolutely safe from crashing the device.
There were a few issues though. These devices tend to be cheap and/or obscure such as Dragon Android tablets and Orange Pi thus unlikely to be in non-BYOD enterprise environments. The Android tables also incorporate sandboxing which prevented an app from sending the command to the process.

Log in to Add Reply
CVSS V3 Severity and Metrics
Base Score:
7.8 High
Impact Score:
5.9
Exploitability Score:
1.8
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector (AV):
Local
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
n/a
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
exploit/multi/local/allwinner_backdoor
Reporter
Unknown

Vendors

  • allwinner

Products

  • linux-3.4-sunxi -
Technical Analysis