CVE-2018-5865 - Integer Underflow (Wrap or Wraparound)

Severity

21%

Complexity

39%

Confidentiality

48%

While processing a debug log event from firmware in all Android releases from CAF using the Linux kernel (Android for MSM, Firefox OS for MSM, QRD Android) before security patch level 2018-07-05, an integer underflow and/or buffer over-read can occur.

CVSS 3.0 Base Score 5.5. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).

CVSS 2.0 Base Score 2.1. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (AV:L/AC:L/Au:N/C:P/I:N/A:N).

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 6 years ago

2018-07-06 19:29:00

Last updated 6 years ago

2018-08-27 18:08:00

Affected Software

Google Android Operating System

References

https://source.android.com/security/bulletin/pixel/2018-07-01

Patch, Vendor Advisory

https://source.codeaurora.org/quic/la/platform/vendor/qcom-opensource/wlan/qcacld-3.0/commit/?id=8fb4202e3bb8cfbbb9f9f0e8695891c9971cfcc2

Patch

https://www.codeaurora.org/security-bulletin/2018/07/02/july-2018-code-aurora-security-bulletin

Patch, Third Party Advisory

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