CVE-2020-16949 - Missing Release of Memory after Effective Lifetime

Severity

75%

Complexity

39%

Confidentiality

60%

A denial of service vulnerability exists in Microsoft Outlook software when the software fails to properly handle objects in memory, aka 'Microsoft Outlook Denial of Service Vulnerability'.

CVSS 3.1 Base Score 7.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

CVSS 2.0 Base Score 5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P).

Demo Examples

Missing Release of Memory after Effective Lifetime

CWE-401

The following C function leaks a block of allocated memory if the call to read() does not return the expected number of bytes:


               
}

                     
return buf;
return NULL;

                           
return NULL;

Overview

Type

Microsoft

First reported 4 years ago

2020-10-16 23:15:00

Last updated 4 years ago

2020-10-21 16:09:00

Affected Software

Microsoft Windows 10 1709

1709

Microsoft Windows 10 1803

1803

Microsoft Windows 10 1809

1809

Microsoft Windows 10 1909

1909

Microsoft Windows RT 8.1

Microsoft Windows Server 2008 Service Pack 2

Microsoft Windows Server 2012

Microsoft Windows Server 2016

Microsoft Windows Server 2016 1909

1909

Microsoft Windows Server 2019

Microsoft 365 Apps Enterprise Edition

Microsoft Office 2019

2019
-

Microsoft Outlook 2013 Service Pack 1

2013

Microsoft Outlook 2016

2016

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16949

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16949

Patch, Vendor Advisory

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