#VU5029 ASLR bypass in Microsoft .NET Framework - CVE-2014-0295

Vulnerability identifier: #VU5029

Vulnerability risk: High

CVSSv4.0: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2014-0295

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Microsoft .NET Framework
Server applications / Frameworks for developing and running applications

Vendor: Microsoft

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

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

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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.