CVE-2017-7367 - Integer Underflow (Wrap or Wraparound)

Severity

93%

Complexity

86%

Confidentiality

165%

In all Android releases from CAF using the Linux kernel, an integer underflow vulnerability exists while processing the boot image.

In all Android releases from CAF using the Linux kernel, an integer underflow vulnerability exists while processing the boot image.

CVSS 3.0 Base Score 7.8. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

CVSS 2.0 Base Score 9.3. CVSS Attack Vector: network. CVSS Attack Complexity: medium. CVSS Vector: (AV:N/AC:M/Au:N/C:C/I:C/A:C).

Demo Examples

Integer Underflow (Wrap or Wraparound)

CWE-191

The following example subtracts from a 32 bit signed integer.


               
}
return 0;

The example has an integer underflow. The value of i is already at the lowest negative value possible, so after subtracting 1, the new value of i is 2147483647.

Overview

First reported 7 years ago

2017-06-13 20:29:00

Last updated 7 years ago

2017-07-08 01:29:00

Affected Software

Google Android Operating System

References

1038623

https://source.android.com/security/bulletin/2017-06-01

Patch, Vendor Advisory

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