ASP.Net page accessing wrong registry? - asp.net

I'm trying to read values from the registry but somehow I seem to be getting the wrong registry. I can't read from any keys that I create and changing the values of keys that I am able to get seems to have no effect.
I'm using Registry.GetValue to get the values and it is returning either null for my keys or the original value for the keys that I changed.
I'm reading the values in an aspx page. The OS is Windows Server 2003 SP2 64bit. IIS is running in 32bit. I'm not sure what other information might be relevant here.
Any information on how this can happen and what I can do about it is appreciated.

If IIS is running in 32-bit mode on a 64-bit server, it will be accessing the WOW64 registry. Try setting values under HKLM\Software\Wow6432Node instead, which will map to a 32-bit process's view of HKLM\Software

Make sure you're not writing to HKEY_CURRENT_USER. Those are for settings localized to the logged in user. Your ASP.NET app isn't going to be able to access your registry settings.
I'm not sure exactly, but I'd suggest trying to place your keys in HKEY_LOCAL_MACHINE/Software. That's where the system wide (like your asp.net app) settings go.

Related

Do QSettings handle windows registry changes?

I´m using settings to read/write values inside windows registry. I would like to be able to reload those values if changes happened.
Actually, this kind of event can be handled with: https://msdn.microsoft.com/en-us/library/windows/desktop/ms724892(v=vs.85).aspx (didn´t test it).
I don´t want to use windows specific code. Then, do QSettings handle registry changes?

Where cookies are stored in system?

If i use Response.Cookies["test"].Value ="Hi"; where are cookie stored in system?
Can i check Cookies["test"] value in my pc because cookies are stored in text format.
I am using VS 2008. Operating system is Windows 7.
I have tried to find in Google but not getting the exact answer. Please help to sort out this problem.
IE and Windows keeps cookies here:
%AppData%\Microsoft\Windows\Cookies
Points to the same directory as #Sohnee's does under Windows Visa and newer, but his doesn't under Windows XP and earlier, my - does.
also Temporary Internet Files can contain some cookies.
Meanwhile Firefox keeps cookies into SQLite database under profile root:
%AppData%\Mozilla\Firefox\Profiles\%FirefoxProfile%\cookies.sqlite
To read the data you need to connect to that database using any SQLite client and execute next query:
select value
from moz_cookies
where name = 'test'
I did it just now using trial SQLite Maestro. And don't forget to close all running Firefoxes before connection attempt.
Cookies are stored in the cookies folder on Windows 7. To open the cookies folder, open run in Windows and type shell:cookies. Also, as suggested above, they might be in Temporary internet files. However, I see that your cookies are not persistent. This means you are not setting any expiration on them. Therefore, they won't be stored on your machine and they will only be part of the browser's memory.
C:\Users\<user_name>\AppData\Local\Google\Chrome\User Data\Default
Also note, "Local" is a hidden folder.
For Windows :
C:\Users\Your User Name\AppData\Local\Google\Chrome\User
Data\Default.
For Mac:
~Library/Application\ Support/Google/Chrome/Default/Cookies
You can use SQLite Browser for access it .
Your cookies are stored in your user folder:
%userprofile%\AppData\Roaming\Microsoft\Windows\Cookies
You will need to "show" hidden / system files to see them.
On Windows 10, I press Win+R and type shell:Cookies to open the cookies folder.
it's a hidden folder, the path is
C:\Users\admin\AppData\Local\Microsoft\Windows\INetCookies

System.Security.SecurityException when writing to Event Log

I’m working on trying to port an ASP.NET app from Server 2003 (and IIS6) to Server 2008 (IIS7).
When I try and visit the page on the browser I get this:
Server Error in ‘/’ Application.
Security Exception
Description: The application attempted to perform an operation not allowed by the security policy. To grant this application the required permission please contact your system administrator or change the application’s trust level in the configuration file.
Exception Details: System.Security.SecurityException: The source was not found, but some or all event logs could not be searched. Inaccessible logs: Security
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and the location of the exception can be identified using the exception stack trace below.
Stack Trace:
[SecurityException: The source was not found, but some or all event logs could not be searched. Inaccessible logs: Security.]
System.Diagnostics.EventLog.FindSourceRegistration(String source, String machineName, Boolean readOnly) +562
System.Diagnostics.EventLog.SourceExists(String source, String machineName) +251
[snip]
These are the things I’ve done to try and solve it:
Give “Everyone” full access permission to the key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\EventLog\Security. This worked. But naturally I can’t do this in production. So I deleted the “Everyone” permission after running the app for a few minutes and the error re-appeared.
I created the source in the Application log and the Security log (and I verified it exists via regedit) during installation with elevated permissions but the error remained.
I gave the app a full trust level in the web.config file (and using appcmd.exe) but to no avail.
Does anyone have an insight as to what could be done here?
PS: This is a follow up to this question. I followed the given answers but to no avail (see #2 above).
To give Network Service read permission on the EventLog/Security key (as suggested by Firenzi and royrules22) follow instructions from http://geekswithblogs.net/timh/archive/2005/10/05/56029.aspx
Open the Registry Editor:
Select Start then Run. Enter regedt32 or regedit
Navigate/expand to the following key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog\Security
3. Right click on this entry and select Permissions
Add the Network Service user
Give it Read permission
UPDATE: The steps above are ok on developer machines, where you do not use deployment process to install application.
However if you deploy your application to other machine(s), consider to register event log sources during installation as suggested in SailAvid's and Nicole Calinoiu's answers.
I am using PowerShell function (calling in Octopus Deploy.ps1)
function Create-EventSources() {
$eventSources = #("MySource1","MySource2" )
foreach ($source in $eventSources) {
if ([System.Diagnostics.EventLog]::SourceExists($source) -eq $false) {
[System.Diagnostics.EventLog]::CreateEventSource($source, "Application")
}
}
}
See also Microsoft KB 2028427 Fail to write to the Windows event log from an ASP.NET or ASP application
The problem is that the EventLog.SourceExists tries to access the EventLog\Security key, access which is only permitted for an administrator.
A common example for a C# Program logging into EventLog is:
string sSource;
string sLog;
string sEvent;
sSource = "dotNET Sample App";
sLog = "Application";
sEvent = "Sample Event";
if (!EventLog.SourceExists(sSource))
EventLog.CreateEventSource(sSource, sLog);
EventLog.WriteEntry(sSource, sEvent);
EventLog.WriteEntry(sSource, sEvent, EventLogEntryType.Warning, 234);
However, the following lines fail if the program hasn't administrator permissions and the key is not found under EventLog\Application as EventLog.SourceExists will then try to access EventLog\Security.
if (!EventLog.SourceExists(sSource))
EventLog.CreateEventSource(sSource, sLog);
Therefore the recommended way is to create an install script, which creates the corresponding key, namely:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\EventLog\Application\dotNET Sample App
One can then remove those two lines.
You can also create a .reg file to create the registry key. Simply save the following text into a file create.reg:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\EventLog\Application\dotNET Sample App]
The solution was to give the "Network Service" account read permission on the EventLog/Security key.
For me ony granting 'Read' permissions for 'NetworkService' to the whole 'EventLog' branch worked.
I had a very similar problem with a console program I develop under VS2010 (upgraded from VS2008 under XP)
My prog uses EnLib to do some logging.
The error was fired because EntLib had not the permission to register a new event source.
So I started once my compiled prog as an Administrator : it registered the event source.
Then I went back developping and debugging from inside VS without problem.
(you may also refer to http://www.blackwasp.co.uk/EventLog_3.aspx, it helped me
This exception was occurring for me from a .NET console app running as a scheduled task, and I was trying to do basically the same thing - create a new Event Source and write to the event log.
In the end, setting full permissions for the user under which the task was running on the following keys did the trick for me:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\eventlog\Application
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\eventlog\Security
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\eventlog
I try almost everything in here to solve this problem... I share here the answer that help me:
Another way to resolve the issue :
in IIS console, go to application pool managing your site, and note the identity running it (usually Network Service)
make sure this identity can read KEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog (rigth-click, authorisations)
now change the identity of this application pool to Local System, apply, and switch back to Network Service
Credentials will be reloaded and EventLog reacheable
in http://geekswithblogs.net/timh/archive/2005/10/05/56029.aspx , thanks Michael Freidgeim
A new key with source name used need to be created under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\eventlog\Application in the regEdit when you use System.Diagnostics.EventLog.WriteEntry("SourceName", "ErrorMessage", EventLogEntryType.Error);
So basically your user does not have permission to create the key. The can do the following depending of the user that you are using from the Identity value in the Application Pool Advanced settings:
Run RegEdit and go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\eventlog
Right click in EventLog key and the select Permissions... option
3.Add your user with full Control access.
-If you are using "NetworkService" add NETWORK SERVICE user
-If you are usinf "ApplicationPoolIdentity" add IIS APPPOL{name of your app pool} (use local machine location when search the user).
-If you are using "LocalSystem" make sure that the user has Administrator permissions. It is not recommend for vulnerabilities.
Repeat the steps from 1 to 3 for HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\eventlog\Security
For debugging with Visual Studio I use "NetworkService" (it is ASP.NET user) and when the site is published I used "AppicationPoolIdentity".
I ran into the same issue, but I had to go up one level and give full access to everyone to the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\EventLog\ key, instead of going down to security, that cleared up the issue for me.
Same issue on Windows 7 64bits.
Run as administrator solved the problem.
There does appear to be a glaringly obvious solution to this that I've yet to see a huge downside, at least where it's not practical to obtain administrative rights in order to create your own event source: Use one that's already there.
The two which I've started to make use of are ".Net Runtime" and "Application Error", both of which seem like they will be present on most machines.
Main disadvantages are inability to group by that event, and that you probably don't have an associated Event ID, which means the log entry may very well be prefixed with something to the effect of "The description for Event ID 0 from source .Net Runtime cannot be found...." if you omit it, but the log goes in, and the output looks broadly sensible.
The resultant code ends up looking like:
EventLog.WriteEntry(
".Net Runtime",
"Some message text here, maybe an exception you want to log",
EventLogEntryType.Error
);
Of course, since there's always a chance you're on a machine that doesn't have those event sources for whatever reason, you probably want to try {} catch{} wrap it in case it fails and makes things worse, but events are now saveable.
FYI...my problem was that accidently selected "Local Service" as the Account on properties of the ProcessInstaller instead of "Local System". Just mentioning for anyone else who followed the MSDN tutorial as the Local Service selection shows first and I wasn't paying close attention....
I'm not working on IIS, but I do have an application that throws the same error on a 2K8 box. It works just fine on a 2K3 box, go figure.
My resolution was to "Run as administrator" to give the application elevated rights and everything works happily. I hope this helps lead you in the right direction.
Windows 2008 is rights/permissions/elevation is really different from Windows 2003, gar.
Hi I ran into the same problem when I was developing an application and wanted to install it on a remote PC, I fixed it by doing the following:
1) Goto your registry, locate: HKLM\System\CurrentControlSet\Services\EventLog\Application(???YOUR_SERVICE_OR_APP_NAME???)
Note that "(???YOUR_SERVICE_OR_APP_NAME???)" is your application service name as you defined it when you created your .NET deployment, for example, if you named your new application "My new App" then the key would be: HKLM\System\CurrentControlSet\Services\EventLog\Application\My New app
Note2: Depending on which eventLog you are writing into, you may find on your DEV box, \Application\ (as noted above), or also (\System) or (\Security) depending on what event your application is writing into, mostly, (\Application) should be fine all the times.
2) Being on the key above, From the menu; Select "FILE" -> "Export", and then save the file. (Note: This would create your necessary registry settings when the application would need to access this key to write into the Event Viewer), the new file will be a .REG file, for the argument sake, call it "My New App.REG"
3) When deploying on PRODuction, consult the Server's System's administrator (SA), hand over the "My New App.REG" file along with the application, and ask the SA to install this REG file, once done (as admin) this would create the key for your applicaion.
4) Run your application, it should not need to access anything else other than this key.
Problem should be resolved by now.
Cause:
When developing an application that writes anything into the EventLog, it would require a KEY for it under the Eventlog registry if this key isn't found, it would try to create it, which then fails for having no permissions to do so. The above process, is similar to deploying an application (manually) whereas we are creating this ourselves, and no need to have a headache since you are not tweaking the registry by adding permissions to EVERYONE which is a securty risk on production servers.
I hope this helps resolving it.
Though the installer answer is a good answer, it is not always practical when dealing with software you did not write. A simple answer is to create the log and the event source using the PowerShell command New-EventLog (http://technet.microsoft.com/en-us/library/hh849768.aspx)
Run PowerShell as an Administrator and run the following command changing out the log name and source that you need.
New-EventLog -LogName Application -Source TFSAggregator
I used it to solve the Event Log Exception when Aggregator runs issue from codeplex.
Had a similar issue with all of our 2008 servers. The security log stopped working altogether because of a GPO that took the group Authenticated Users and read permission away from the key HKLM\System\CurrentControlSet\Services\EventLog\security
Putting this back per Microsoft's recommendation corrected the issue. I suspect giving all authenticated users read at a higher level will also correct your problem.
I hit similar issue - in my case Source contained <, > characters. 64 bit machines are using new even log - xml base I would say and these characters (set from string) create invalid xml which causes exception. Arguably this should be consider Microsoft issue - not handling the Source (name/string) correctly.
My app gets installed on client web servers. Rather than fiddling with Network Service permissions and the registry, I opted to check SourceExists and run CreateEventSource in my installer.
I also added a try/catch around log.source = "xx" in the app to set it to a known source if my event source wasn't created (This would only come up if I hot swapped a .dll instead of re-installing).
Solution is very simple - Run Visual Studio Application in Admin mode !
I had a console application where I also had done a "Publish" to create an Install disk.
I was getting the same error at the OP:
The solution was right click setup.exe and click Run as Administrator
This enabled the install process the necessary privilege's.
I had this issue when running an app within VS. All I had to do was run the program as Administrator once, then I could run from within VS.
To run as Administrator, just navigate to your debug folder in windows explorer. Right-click on the program and choose Run as administrator.
try below in web.config
<system.web>
<trust level="Full"/>
</system.web>
Rebuilding the solution worked for me

running aspnet_setreg.exe on a windows 2008 server

I have a site that uses aspnet_setreg.exe to encrypt the username and password of the identity user into the registry. It has always worked fine but when I run it on a Windows 2008 i get this:
C:\aspnet_setreg>aspnet_setreg.exe -k:SOFTWARE\MYCODE\identity -u:"domain\user" -p:"password"
Please edit your configuration to contain the following:
userName="registry:HKLM\SOFTWARE\MYCODE\identity\ASPNET_SETREG,userName"
password="registry:HKLM\SOFTWARE\MYCODE\identity\ASPNET_SETREG,password"
The DACL on the registry key grants Full Control to System, Administrators, and Creator Owner.
If you have encrypted credentials for the configuration section, or a connection string for the configuration section, ensure that the process identity has Read access to the registry key. Furthermore, if you have configured IIS to access content on a
UNC share, the account used to access the share will need Read access to the registry key.
Regedt32.exe may be used to view/modify registry key permissions.
You may rename the registry subkey and registry value in order to prevent discovery.
Does anyone else use this and have you seen it work on 2008.
Thanks
Potential issue with aspnet_setreg.exe is that it's a 32 bit process, and will write to the Wow6432Node rather than the places indicated above. If you are running a 64 bit app pool, you will need to copy the reg key to the "real" x64 location.
1) The aspnet_setreg application was putting the registry entry into HKLM\Software\Wow6432Node\rest of path.
As mentioned above, this is the behavior for a 32bit app modifying a 64 bit registry entry.
2) To move the key to the right location, I exported the key to a .reg file and then edited the file and got rid of the Wow6432Node directory in the file.
3) Alternatively, you could just use the Wow6432Node path:
For example:
userName="registry:HKLM\Software\Wow6432Node\MYCODE\identity\ASPNET_SETREG,userName"
password="registry:HKLM\Software\Wow6432Node\MYCODE\identity\ASPNET_SETREG,password"
4) Also, note that you must have admin privileges to run this. On Windows 7, I ran it from command line with using the "run as administrator", and aspnet_setreg stored it in
HKEY_USERS[USER SID]\Software\Classes\VirtualStore\MACHINE\SOFTWARE\Wow6432Node.
5) Finally, remember to set the permissions to the registry entry so that your application can read from the registry key.
References: http://support.microsoft.com/kb/329290
You are correct about x64 location. How do I get aspnet_setreg.exe to set the reg values at the x32 registry location?
I moved the keys from a 2003 server. But would still like to know if anyone else has experiance with using this on a 2008 machine.

What do I need to change to allow my IIS7 ASP.Net 3.5 application to create an event source and log events to Windows EventLog?

ASP.Net 3.5 running under IIS 7 doesn't seem to allow this out of the box.
if (!EventLog.SourceExists("MyAppLog"))
EventLog.CreateEventSource("MyAppLog", "Application");
EventLog myLog = new EventLog();
myLog.Source = "MyAppLog";
myLog.WriteEntry("Message");
I've copied this answer from here (the question was Log4Net but the answer still applies). The technet link misses a vital step.
Create a registry key
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\eventlog\Application\MY-AWESOME-APP
Create a string value inside this
Name it EventMessageFile, set its value to
C:\Windows\Microsoft.NET\Framework\v2.0.50727\EventLogMessages.dll
That path appears to work in both 64 bit and 32 bit environments.
With this technique you don't need to set permissions in the registry, and once the key above is created it should just work.
Alternatively
If you don't have a large server farm but just a small "web garden" you could run a console application on each server that creates the event log source using EventLog.CreateEventSource, make sure the console application is run by an administrator.
This is part of windows security since windows 2003.
You need to create an entry in the registry under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog\Application Make sure that network service or the account you impersonate has permission to this registry key.
#CheGueVerra's link: Requested Registry Access Is Not Allowed
Right click the application and choose "Run as Administrator"

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