Multiple vulnerabilities in Microsoft .NET Framework

Published: 2014-02-11 | Updated: 2017-03-11
Severity High
Patch available YES
Number of vulnerabilities 3
CVE ID CVE-2014-0257
CVE-2014-0253
CVE-2014-0295
CWE ID CWE-264
CWE-20
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerability #3 is being exploited in the wild.
Vulnerable software Microsoft .NET Framework Subscribe
Vendor Microsoft

Security Advisory

1) Type Traversal Vulnerability

Severity: Medium

CVSSv3: 8.9 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C] [PCI]

CVE-ID: CVE-2014-0257

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Description

The vulnerability allows a remote attacker to bypass certain security restrictions.

The weakness exists due to the failure to properly verify safety of a method for execution within Microsoft .NET Framework. A remote attacker can run a specially crafted Web site, trick the victim into visiting it and gain elevated privileges and execute arbitrary code.

Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Microsoft .NET Framework: 1.1, 2.0, 3.5, 3.5.1, 4.0, 4.5.1

CPE External links

https://technet.microsoft.com/en-us/library/security/ms14-009

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.

2) Denial of service

Severity: Medium

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

CVE-ID: CVE-2014-0253

CWE-ID: CWE-20 - Improper Input Validation

Description

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

The weakness exists due to the failure to properly identify stale or closed HTTP client connections within Microsoft ASP.NET. By sending a specially crafted HTTP POST request, a remote attacker can cause the server to stop responding.

Successful exploitation of the vulnerability may allow an attacker to perform denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Microsoft .NET Framework: 1.1, 2.0, 3.5, 3.5.1, 4.0, 4.5.1

CPE External links

https://technet.microsoft.com/en-us/library/security/ms14-009

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) ASLR bypass

Severity: High

CVSSv3: 6.9 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N/E:F/RL:O/RC:C] [PCI]

CVE-ID: CVE-2014-0295

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Description

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The weakness exists due to missing Address Space Layout Randomization (ASLR) features in certain components. A remote attacker can create a specially crafted Web site, trick the victim into opening it, bypass security restrictions and execute another attack.

Successful exploitation of the vulnerability results in security bypass on the vulnerable system.

Note: the vulnerability was being actively exploited.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Microsoft .NET Framework: 1.1, 3.5.1

CPE External links

https://technet.microsoft.com/en-us/library/security/ms14-009

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.