Denial of service in Microsoft Windows Transport Layer Security



Published: 2020-05-12
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-1118
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Windows
Operating systems & Components / Operating system

Windows Server
Operating systems & Components / Operating system

Vendor Microsoft

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Input validation error

EUVDB-ID: #VU27854

Risk: High

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-1118

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to the Windows implementation of Transport Layer Security (TLS) improperly handles certain key exchanges. A remote attacker can send a specially crafted request to a target system utilizing TLS 1.2 or lower and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: 10 1709 - 10 1909

Windows Server: 2019 - 2019 1909


CPE2.3 External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1118

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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



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