MS11-100: Vulnerabilities in .NET Framework Could Allow Elevation of Privilege (2638420)
High Nessus Plugin ID 57414
SynopsisThe version of ASP.NET Framework installed on the remote host is affected by multiple vulnerabilities.
DescriptionThe remote Windows host is running a version of the Microsoft ASP.NET Framework that has multiple vulnerabilities. These include:
- A flaw exists in the way ASP.NET generates hash tables for user-supplied values. By sending a small number of specially crafted posts to an ASP.NET server, an attacker can take advantage of this flaw to cause a denial of service condition. (CVE-2011-3414)
- The Framework does not properly validate return URLs during the forms authentication process, which could allow an attacker to redirect a victim to a malicious website. (CVE-2011-3415)
- ASP.NET forms authentication contains a vulnerability that could allow an attacker that already has a registered user on an application to gain the privileges of another known user. (CVE-2011-3416)
- An elevation of privilege vulnerability exists in the way that ASP.NET Framework handles cached content when Forms Authentication is used with sliding expiry. An attacker can take advantage of this vulnerability to execute code in the context of a target user by tricking the user into visiting a specially crafted link. (CVE-2011-3417)
SolutionMicrosoft has released a set of patches for the .NET Framework on Windows XP, 2003, Vista, 2008, 7, and 2008 R2.