CVE-2017-18066 - Use After Free

Severity

46%

Complexity

39%

Confidentiality

106%

In Android for MSM, Firefox OS for MSM, QRD Android, with all Android releases from CAF using the Linux kernel, improper controls in MSM CORE leads to use memory after it is freed in msm_core_ioctl().

In Android for MSM, Firefox OS for MSM, QRD Android, with all Android releases from CAF using the Linux kernel, improper controls in MSM CORE leads to use memory after it is freed in msm_core_ioctl().

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:L/UI:N/S:U/C:H/I:H/A:H).

CVSS 2.0 Base Score 4.6. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (AV:L/AC:L/Au:N/C:P/I:P/A:P).

Demo Examples

Use After Free

CWE-416

The following example demonstrates the weakness.


               
}
free(buf3R2);

Use After Free

CWE-416

The following code illustrates a use after free error:


               
}
free(ptr);
logError("operation aborted before commit", ptr);

When an error occurs, the pointer is immediately freed. However, this pointer is later incorrectly used in the logError function.

Overview

First reported 6 years ago

2018-03-16 22:29:00

Last updated 6 years ago

2018-04-04 13:33:00

Affected Software

Google Android Operating System

References

https://source.android.com/security/bulletin/pixel/2018-03-01

Vendor Advisory

https://source.codeaurora.org/quic/la/kernel/msm-3.18/commit/?id=ff11f44c0c10c94170f03a8698f73f7e08b74625

Patch, Third Party Advisory

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