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- #WHAT IS .NET FRAMEWORK V4.0.30319 UPDATE#
- #WHAT IS .NET FRAMEWORK V4.0.30319 CODE#
- #WHAT IS .NET FRAMEWORK V4.0.30319 WINDOWS#
Int _stdcall CookieAuthConstructTicket(int a1, int a2, LPCWSTR Src, const WCHAR *a4, const WCHAR *a5, int a6, int a7) Shows that the CopyStringToUnAlignedBuffer() function is used to copy unicode The disassembly of the CookieAuthConstructTicket() function (webengine4.dll) Internal static extern int CookieAuthConstructTicket(byte pData, int iDataLen, string szName, string szData, string szPath, byte pBytes, long pDates) Num = (dst, dst.Length, ticket.Name, ticket.UserData, ticket.CookiePath, pBytes, pDates) If (TicketCompatibilityMode = .Framework20)
#WHAT IS .NET FRAMEWORK V4.0.30319 CODE#
Source code excerpt: private static byte MakeTicketIntoBinaryBlob(FormsAuthenticationTicket ticket) The result is returned in the dst buffer. The username is passed as the ticket.Name parameter, The native method CookieAuthConstructTicket() from the external library If the parameter's "TicketCompatibilityMode" value is set to "Framework20" !.SetAuthCookie(string userName = "admin\0AAAAA", bool createPersistentCookie = false) Line 799 C# !.SetAuthCookie(string userName = "admin\0AAAAA", bool createPersistentCookie = false, string strCookiePath = "/") Line 810 + 0圆2 bytes C# !.GetAuthCookie(string userName = "admin\0AAAAA", bool createPersistentCookie = false, string strCookiePath = "/", bool he圎ncodedTicket = true) Line 309 + 0xd bytes C# Return (((!checkIfEmpty || (param.Length >= 1)) & ((maxSize !.MakeTicketIntoBinaryBlob( ticket =, bool he圎ncodedTicket = true) Line 253 + 0x9 bytes C# Internal static bool ValidateParameter(ref string param, bool checkForNull, bool checkIfEmpty, bool checkForCommas, int maxSize) Status = MembershipCreateStatus.InvalidUserName If (!SecUtility.ValidateParameter(ref username, true, true, true, 0x100)) Public override MembershipUser CreateUser(string username, string password, string email, string passwordQuestion, string passwordAnswer, bool isApproved, object providerUserKey, out MembershipCreateStatus status) The username length and if the username contains commas.
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Parameter is done by the ValidateParameter() function, which basically checks The only validation (besides ASP.NET request validation) of the username )) with the parameters that the user has submitted to the form. Which calls the CreateUser() function of the The interesting one is "CreateUserWizard", Standard built-in controls for the membership management, for example, If developers are programming the "Microsoft way" then they will use the By exploiting this vulnerability an attacker is able to log onĪs a different existing user with all the privileges of the targeted user Microsoft ASP.NET membership system depends on theįormsAuthentication.SetAuthCookie(username, false) method for certainįunctionality. This vulnerability can be leveraged into an authentication bypass If the unicode stringĬontaining a null byte is passed, its length is incorrectly calculated, so onlyĬharacters before the null byte are copied into the buffer. The lstrlenW function returns the length of the string, inĬharacters not including the terminating null character. The unicode string length is determined using the lstrlenWįunction. The null byte termination vulnerability exists in theĬopyStringToUnAlingnedBuffer() function of the webengine4.dll library used by
#WHAT IS .NET FRAMEWORK V4.0.30319 UPDATE#
This advisory is an update to SEC Consult SA-20111230-0 with a detailed PoCįurthermore, SEC Consult created a PoC video which can be found here: Source: Vulnerability overview/description: NET Framework provides a comprehensive and consistent programming modelįor building applications that have visually stunning user experiences and NET to run an application on their computer.
#WHAT IS .NET FRAMEWORK V4.0.30319 WINDOWS#
".NET is an integral part of many applications running on Windows and providesĬommon functionality for those applications to run. Gudinavicius / SEC Consult Vulnerability Lab Title: Microsoft ASP.NET Forms Authentication Bypass SEC Consult Vulnerability Lab Security Advisory