KLA10659
Multiple vulnerabilities in Microsoft .NET Framework
Updated: 06/01/2019
Detect date
?
09/08/2015
Severity
?
High
Description

Multiple serious vulnerabilities have been found in .NET Framework. Malicious users can exploit these vulnerabilities to cause denial of service, bypass security restrictions or gain privileges.

Below is a complete list of vulnerabilities

  1. Improper memory objects validation can be exploited remotely via a specially designed application or Website to gain privileges or bypass security restrictions;
  2. Improper requests handling at ASP.NET server can be exploited remotely via a specially designed requests to cause denial of service.

Technical details

For vulnerability (1) there are 2 exploitation scenarios. In web attack scenario attacker use web content with specially designed XAML browser application. For success exploitation of this scenario user must be logged in and use browser which is capable for instantinating XBAPs. In .NET app scenario attacker can use malicious .NET application to bypass Code Access Security restrictions. Second scenario requires that affected system allow to run untrusted .NET applications.

Attacker exploiting vulnerability (2) could send small number of specially designed requests to degrade performance of ASP.NET server enough to cause denial of service.

Affected products

.NET Framework 2.0 Service Pack 2
.NET Framework 3.5, 3.5.1
.NET Framework 4, 4.5, 4.5.1, 4.5.2, 4.6

Solution

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)

Original advisories

CVE-2015-2504
CVE-2015-2526

Impacts
?
DoS 
[?]

PE 
[?]
Related products
Microsoft .NET Framework
CVE-IDS
?
CVE-2015-25049.3Critical
CVE-2015-25265.0Critical
Microsoft official advisories
Microsoft Security Update Guide
KB list

3074549
3074548
3074552
3074229
3074232
3074231
3074228
3074553
3089662