Multiple vulnerabilities in Microsoft .NET Framework

Published: 2018-12-11 22:04:47
Severity High
Patch available YES
Number of vulnerabilities 2
CVE ID CVE-2018-8540
CVE-2018-8517
CVSSv3 8.7 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
6.7 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]
CWE ID CWE-94
CWE-20
Exploitation vector Network
Public exploit Public exploit code for vulnerability #2 is available.
Vulnerable software Microsoft .NET Framework
Vulnerable software versions Microsoft .NET Framework 4.5.2
Microsoft .NET Framework 4.6
Microsoft .NET Framework 3.5.1

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Vendor URL Microsoft

Security Advisory

1) Code Injection

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to an error when the Microsoft .NET Framework fails to validate input properly. A remote attacker can pass specific input to an application utilizing susceptible .Net methods and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install updates from vendor's website.

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8540

2) Input validation error

Description

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

The vulnerability exists due to an error when .NET Framework improperly handles special web requests. A remote attacker can issue a specially crafted requests to the .NET Framework application and cause the service to crash

Remediation

Install updates from vendor's website.

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8517

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