CVE-2020-0126 - Use After Free

Severity

64%

Complexity

5%

Confidentiality

98%

In multiple functions in DrmPlugin.cpp, there is a possible use after free due to a race condition. This could lead to local code execution with System execution privileges required. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10Android ID: A-137878930

CVSS 3.1 Base Score 6.4. CVSS Attack Vector: local. CVSS Attack Complexity: high. CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H).

CVSS 2.0 Base Score 6.9. CVSS Attack Vector: local. CVSS Attack Complexity: medium. CVSS Vector: (AV:L/AC:M/Au:N/C:C/I:C/A:C).

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 4 years ago

2020-06-11 15:15:00

Last updated 4 years ago

2020-06-15 17:04:00

Affected Software

Google Android 10.0

10.0

References

https://source.android.com/security/bulletin/pixel/2020-06-01

https://source.android.com/security/bulletin/pixel/2020-06-01

Patch, Vendor Advisory

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