Multiple vulnerabilities in Microsoft .NET Framework and Core



Published: 2020-01-14 | Updated: 2020-03-25
Risk High
Patch available YES
Number of vulnerabilities 3
CVE ID CVE-2020-0605
CVE-2020-0606
CVE-2020-0646
CWE ID CWE-20
Exploitation vector Network
Public exploit Public exploit code for vulnerability #3 is available.
Vulnerable software
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Microsoft .NET Framework
Server applications / Frameworks for developing and running applications

Microsoft .NET Core
Server applications / Frameworks for developing and running applications

Vendor Microsoft

Security Advisory

Updated: 25.03.2020

Added exploit to vulnerability #3, updated CVSS score.

1) Input validation error

Risk: High

CVSSv3: 7.7 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-0605

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input when the software fails to check the source markup of a file. A remote attacker can trick a victim to open s specially crafted file and execute arbitrary code in the context of the current user.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Microsoft .NET Framework: 3.0, 3.5, 3.5.1, 4.5.2, 4.6, 4.6.2, 4.8

Microsoft .NET Core: 3.0, 3.1

CPE External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0605

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) Input validation error

Risk: High

CVSSv3: 7.7 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-0606

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input when the software fails to check the source markup of a file. A remote attacker can trick a victim to open s specially crafted file and execute arbitrary code in the context of the current user.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Microsoft .NET Framework: 3.0, 3.5, 3.5.1, 4.5.2, 4.6, 4.8

Microsoft .NET Core: 3.0, 3.1

CPE External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0606

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.

3) Input validation error

Risk: High

CVSSv3: 9.1 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-0646

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: Yes [Search exploit]

Description

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

The vulnerability exists due to insufficient validation of user-supplied input in the Microsoft .NET Framework. A remote attacker can pass specific input to an application utilizing susceptible .Net methods and execute arbitrary code on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft .NET Framework: 3.0, 3.5, 3.5.1, 4.5.2, 4.6, 4.6.2, 4.8

CPE External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0646

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. However, a fully functional exploit for this vulnerability is available.