1) Improper Authentication

Risk: Medium

CVSSv3: 7 [CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-1384

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to the NETLOGON message is able to obtain the session key and sign messages. A remote authenticated attacker can send a specially crafted authentication request, bypass authentication process and gain unauthorized access to another machine using the original user privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: 7, 8.1, 10, 10 1607, 10 1709, 10 1803, 10 1809, 10 1903, RT 8.1

Windows Server: 2008, 2008 R2, 2012, 2012 R2, 2016, 2019, 2019 1803, 2019 1903

CPE

• cpe:/o:microsoft:windows:7:
• cpe:/o:microsoft:windows:8.1:
• cpe:/o:microsoft:windows:RT 8.1:
• cpe:/o:microsoft:windows:10:
• cpe:/o:microsoft:windows:10 1607:
• cpe:/o:microsoft:windows:10 1709:
• cpe:/o:microsoft:windows:10 1803:
• cpe:/o:microsoft:windows:10 1809:
• cpe:/o:microsoft:windows:10 1903:
• cpe:/o:microsoft:windows_server:2008 R2:
• cpe:/o:microsoft:windows_server:2008:
• cpe:/o:microsoft:windows_server:2012:
• cpe:/o:microsoft:windows_server:2012 R2:
• cpe:/o:microsoft:windows_server:2016:
• cpe:/o:microsoft:windows_server:2019 1803:
• cpe:/o:microsoft:windows_server:2019:
• cpe:/o:microsoft:windows_server:2019 1903:

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1384

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Man-in-the-Middle (MitM) attack

Risk: Medium

CVSSv3: 6.5 [CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-1424

CWE-ID: CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a man-in-the-middle (MitM) attack.

The vulnerability exists due to the Windows Netlogon improperly handles a secure communications channel. A remote attacker can perform a man-in-the-middle attack and downgrade aspects of the connection allowing for further modification of the transmission.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: 7, 8.1, 10, 10 1607, 10 1709, 10 1803, 10 1809, 10 1903, RT 8.1

Windows Server: 2008, 2008 R2, 2012, 2012 R2, 2016, 2019, 2019 1803, 2019 1903

CPE

• cpe:/o:microsoft:windows:7:
• cpe:/o:microsoft:windows:8.1:
• cpe:/o:microsoft:windows:RT 8.1:
• cpe:/o:microsoft:windows:10:
• cpe:/o:microsoft:windows:10 1607:
• cpe:/o:microsoft:windows:10 1709:
• cpe:/o:microsoft:windows:10 1803:
• cpe:/o:microsoft:windows:10 1809:
• cpe:/o:microsoft:windows:10 1903:
• cpe:/o:microsoft:windows_server:2008 R2:
• cpe:/o:microsoft:windows_server:2008:
• cpe:/o:microsoft:windows_server:2012:
• cpe:/o:microsoft:windows_server:2012 R2:
• cpe:/o:microsoft:windows_server:2016:
• cpe:/o:microsoft:windows_server:2019 1803:
• cpe:/o:microsoft:windows_server:2019:
• cpe:/o:microsoft:windows_server:2019 1903:

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1424

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.