Denial of service in Microsoft ASP.NET Core

Published: 2019-01-08

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2019-0548 CVE-2019-0564
CWE-ID	CWE-20
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	ASP.NET Core MVC Universal components / Libraries / Software for developers
Vendor	Microsoft

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper input validation

EUVDB-ID: #VU16869

Risk: Low

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-0548

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the way that .NET Core handles specially crafted requests. A remote attacker can send specially crafted requests to an .NET Core web application and cause service crash.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ASP.NET Core MVC: 2.1.0 - 2.2

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0548

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.

2) Improper input validation

EUVDB-ID: #VU16870