CVE-2020-1381 - Use After Free

Severity

78%

Complexity

18%

Confidentiality

98%

An elevation of privilege vulnerability exists when the Windows Graphics Component improperly handles objects in memory, aka 'Windows Graphics Component Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2020-1382.

CVSS 3.1 Base Score 7.8. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/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

Type

Microsoft Windows

First reported 4 years ago

2020-07-14 23:15:00

Last updated 4 years ago

2020-07-21 18:22:00

Affected Software

Microsoft Windows 10 1909

1909

Microsoft Windows Server 2016 1909

1909

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1381

https://www.zerodayinitiative.com/advisories/ZDI-20-872/

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1381

Patch, Vendor Advisory

https://www.zerodayinitiative.com/advisories/ZDI-20-872/

Third Party Advisory

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