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  • Untrusted GPGPU code (OpenCL etc) - is it safe? What risks?

    - by Grzegorz Wierzowiecki
    There are many approaches when it goes about running untrusted code on typical CPU : sandboxes, fake-roots, virtualization... What about untrusted code for GPGPU (OpenCL,cuda or already compiled one) ? Assuming that memory on graphics card is cleared before running such third-party untrusted code, are there any security risks? What kind of risks? Any way to prevent them ? (Possible sandboxing on gpgpu or other technique?) P.S. I am more interested in gpu binary code level security rather than hight-level gpgpu programming language security (But those solutions are welcome as well). What I mean is that references to gpu opcodes (a.k.a machine code) are welcome.

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  • SharePoint Navigation Custom Link Security Trimming

    - by ifunky
    Hi, We've got our navigation setup so that subsites show in the global navigation but we have a requirement to also put custom links to external sites which is straight forward. The tricky part is that some of the custom links need security trimming which you don't get when you add your own links to the navigation. Just wondering if anyone has got some ideas on how to work around this? Thanks Dan

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  • Paypal's "Security header is not valid"

    - by Paypal
    I'm implementing the Express Checkout? I have no problem with the first two steps:SetExpressCheckout and GetExpressCheckout,but met the "Security header is not valid" at DoExpressCheckout. The API credentials are the same! I've fixed it by changing the $environment to live in DoExpressCheckout.(The difference is that it'll use https://api.sandbox.paypal.com/nvp/ instead of https://api-3t.$environment.paypal.com/nvp) But why? Is there something wrong with https://api-3t.$environment.paypal.com/nvp?

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  • Make a Method of the Business Layer secure. best practice / best pattern [.net/c#]

    - by gsharp
    Hi We are using ASP.NET with a lot of AJAX "Page Method" calls. The WebServices defined in the Page invokes methods from our BusinessLayer. To prevent hackers to call the Page Methods, we want to implement some security in the BusinessLayer. We are struggling with two different issues. First one: public List<Employees> GetAllEmployees() { // do stuff } This Method should be called by Authorized Users with the Role "HR". Second one: public Order GetMyOrder(int orderId) { // do sutff } This Method should only be called by the owner of the Order. I know it's easy to implement the security for each method like: public List<Employees> GetAllEmployees() { // check if the user is in Role HR } or public Order GetMyOrder(int orderId) { // check if the order.Owner = user } What I'm looking for is some pattern/best practice to implement this kind of security in a generic way (without coding the the if then else every time) I hope you get what i mean :-) Thanks for you help.

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  • Make a Method of the Business Layer secure. best practice / best pattern

    - by gsharp
    We are using ASP.NET with a lot of AJAX "Page Method" calls. The WebServices defined in the Page invokes methods from our BusinessLayer. To prevent hackers to call the Page Methods, we want to implement some security in the BusinessLayer. We are struggling with two different issues. First one: public List<Employees> GetAllEmployees() { // do stuff } This Method should be called by Authorized Users with the Role "HR". Second one: public Order GetMyOrder(int orderId) { // do sutff } This Method should only be called by the owner of the Order. I know it's easy to implement the security for each method like: public List<Employees> GetAllEmployees() { // check if the user is in Role HR } or public Order GetMyOrder(int orderId) { // check if the order.Owner = user } What I'm looking for is some pattern/best practice to implement this kind of security in a generic way (without coding the the if then else every time) I hope you get what i mean :-)

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  • osCommerce Security Issue

    - by Auxi
    Hi, I am planning to integrate some opensource shopping cart with my site and I am bit worried about it's security. Is it that easy to hack osCommerce based website? Because I am thinking to use osCommerce.. Kindly advise.

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  • Where can I find a deliberately insecure open source web application?

    - by Phil Laliberte
    As a developer, I've learned that I usually gain a better understanding of best/worst practices through experience. The area of web application security isn't really somewhere where my organization can afford to let developers learn through trial and error. So looking for a hands-on approach to knowledge sharing of best practices in web application security, I was thinking that it would be useful to have an open source application that was deliberately built to be insecure in order to help teach junior developers about application security. Does anyone out there know where to find something like this?

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  • default file/folder security permissions sbs 2003

    - by Floris
    I have lost all file/folder security permissions of a SBS 2003 installation and was wondering is there some command I can run to restore system file/folder permissions to there default values. I lost the permissions when I had boot error and had to restore the primary boot sector from backup primary boot sector and had to tun fixboot to get the system booting again. Many Thanks Floris

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  • Storing a NTFS Security Descriptor in C

    - by Doori Bar
    My goal is to store a NTFS Security Descriptor in its identical native state. The purpose is to restore it on-demand. I managed to write the code for that purpose, I was wondering if anybody mind to validate a sample of it? (The for loop represents the way I store the native descriptor) This sample only contains the flag for "OWNER", but my intention is to apply the same method for all of the security descriptor flags. I'm just a beginner, would appreciate the heads up. Thanks, Doori Bar #define _WIN32_WINNT 0x0501 #define WINVER 0x0501 #include <stdio.h> #include <windows.h> #include "accctrl.h" #include "aclapi.h" #include "sddl.h" int main (void) { DWORD lasterror; PSECURITY_DESCRIPTOR PSecurityD1, PSecurityD2; HANDLE hFile; PSID owner; LPTSTR ownerstr; BOOL ownerdefault; int ret = 0; unsigned int i; hFile = CreateFile("c:\\boot.ini", GENERIC_READ | ACCESS_SYSTEM_SECURITY, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL); if (hFile == INVALID_HANDLE_VALUE) { fprintf(stderr,"CreateFile() failed. Error: INVALID_HANDLE_VALUE\n"); return 1; } lasterror = GetSecurityInfo(hFile, SE_FILE_OBJECT, OWNER_SECURITY_INFORMATION , &owner, NULL, NULL, NULL, &PSecurityD1); if (lasterror != ERROR_SUCCESS) { fprintf(stderr,"GetSecurityInfo() failed. Error: %lu;\n", lasterror); ret = 1; goto ret1; } ConvertSidToStringSid(owner,&ownerstr); printf("ownerstr of PSecurityD1: %s\n", ownerstr); /* The for loop represents the way I store the native descriptor */ PSecurityD2 = malloc( GetSecurityDescriptorLength(PSecurityD1) * sizeof(unsigned char) ); for (i=0; i < GetSecurityDescriptorLength(PSecurityD1); i++) ((unsigned char *) PSecurityD2)[i] = ((unsigned char *) PSecurityD1)[i]; if (IsValidSecurityDescriptor(PSecurityD2) == 0) { fprintf(stderr,"IsValidSecurityDescriptor(PSecurityD2) failed.\n"); ret = 2; goto ret2; } if (GetSecurityDescriptorOwner(PSecurityD2,&owner,&ownerdefault) == 0) { fprintf(stderr,"GetSecurityDescriptorOwner() failed."); ret = 2; goto ret2; } ConvertSidToStringSid(owner,&ownerstr); printf("ownerstr of PSecurityD2: %s\n", ownerstr); ret2: free(owner); free(ownerstr); free(PSecurityD1); free(PSecurityD2); ret1: CloseHandle(hFile); return ret; }

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  • Writable folder by all users on the same pc

    - by Catalin DICU
    I have a desktop .NET WPF application witch uses an embedded database (SQLite). Where to put the database file ? It's the same database for all users. I tried to use CommonAppData but it's not writable by non-admin users. So I tried to use a custom installer action to give write rights to all users to this folder but it fails on domain PCs. The code is: DirectorySecurity security = Directory.GetAccessControl(appDataPath); FileSystemAccessRule rule = new FileSystemAccessRule("Users", FileSystemRights.WriteData, InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit, PropagationFlags.InheritOnly, AccessControlType.Allow); security.AddAccessRule(rule); Directory.SetAccessControl(appDataPath, security); Would ".\Users" insead of "Users" work on a domain ? Is this the best approach ? Is there any other folder I could use ?

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  • IIS token based security, ssl certificate and https, proxy

    - by davidgshi
    I have developed a new web service. Now, I need to deal with security issue as we are intending to make it a secure service. In order to set up SSL and https, I need to obtain and install an SSL certificate. Who is the certificate authority? Do you know how to go about with this? Are there concise articles on this? Regards. David

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  • Microsoft .NET security model

    - by Thomas
    Hi all, I am looking for informations about the security model of Microsoft .NET If you could explain me how it is design, or give me links to understand it, it would be very kind of you ! Thanks.

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  • Grails spring security defaultTargetUrl going wrong path

    - by fsi
    Grails 2.4 with Spring security 2 3RC I have this on my Config.groovy grails.plugin.springsecurity.controllerAnnotations.staticRules = [ '/': ['permitAll'], '/index': ['permitAll'], '/index.gsp': ['permitAll'], '/**/js/**': ['permitAll'], '/**/css/**': ['permitAll'], '/**/images/**': ['permitAll'], '/**/favicon.ico': ['permitAll'] ] grails.plugin.springsecurity.successHandler.defaultTargetUrl = "/home/index" But this keeping me redirecting to assets/favicon.ico And my HomeController is like that @Secured(['ROLE_ADMIN', 'ROLE_USER']) def index() { if (SpringSecurityUtils.ifAllGranted('ROLE_ADMIN')) { redirect controller: 'admin', action: 'index' return } } And I modify this in my UrlMapping: "/"(controller: 'home', action:'index') Why it keeps me sending wrong path? Update: using another computer, it redirects me to /asset/grails_logo.png

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  • Limiting what a .net plugin can access

    - by David Hogue
    I have a web application that can load plugins through reflection. It currently uses Assembly.LoadFrom() and Activator.CreateInstance() to get this done. Right now plugins are loaded into the same AppDomain and have access to anything in my app and anything my app could access. What I'm looking for is a way to limit what classes and methods the plugin can access for security purposes. I want to have all of my classes and methods throw an exception when called unless they are whitelisted. I'd be whitelisting basically all the functions in an API class and a few data transfer objects. I also don't want the plugin to be able to access the filesystem or the database on it's own. I think I can do that with trust levels in a separate AppDomain though. Does anyone out there have any good ideas or resources? Is this something that could be done with Code Access Security or the new Security-Transparent Code features in .net 4?

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  • Beginning PHP for someone interested in Security

    - by MaXX
    I'd like to learn PHP specifically for dealing with security vulnerabilities/exploits. Could someone recommend a book? I don't know if I need to learn HTML/CSS/XML/XHTML etc, do I have to learn those too? I don't really plan on designing websites, could anyone help me with this? :P

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  • Coverity publie Coverity Security Library, une bibliothèque open-source pour identifier les défauts de sécurité dans les applis Web Java

    Coverity publie Coverity Security Library Une bibliothèque open source pour identifier les défauts de sécurité les plus courants dans les applis Web Java Coverity, un des leaders du marché du test de développement, vient d'annoncer la création de la Coverity Security Library, un projet open source (disponible via GitHub et Maven) pour aider les développeurs à réparer les attaques de type cross-site scripting (XSS) dans les applications Web Java. Ce projet a été initié par le Security Research Laboratory de Coverity. Il s'agit d'une bibliothèque de fonctions de contournement et de codage gratuite. « Les développeurs peuvent ainsi réparer rapidement les problèmes les plus courants, qui p...

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  • How to deal with ssh's "WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!"?

    - by Vi.
    I often need to login to multiple remote stations that are just placed to the same static IPs for me. SSH complains about changed keys in this case: $ ssh [email protected] @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ ... Offending RSA key in /home/vi/.ssh/known_hosts:70 ... I usually just run vim /home/vi/.ssh/known_hosts +70, dd wq and re-run the SSH command. How to do it simpler? Requirements: The warning should be displayed, and not like this: The authenticity of host '172.1.2.3 (172.1.2.3)' can't be established. It is easy to accept the key change. I expect something like this: $ ssh [email protected] @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ ... The fingerprint for the RSA key sent by the remote host is 82:cd:be:7a:ae:1b:91:2c:23:c1:74:4d:8a:38:10:32. Change the host key in /home/vi/.ssh/known_hosts (yes/no)? yes Warning: Changed host key for '172.1.2.3' (RSA) in the list of known hosts. [email protected]'s password: Simple and differs from usual "The authenticity of host can't be established." message.

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  • Calling a WCF service from another WCF service

    - by ultraman69
    Hi ! I have a WCF service hosted on a windows service on my Server1. It also has IIS on this machine. I call the service from a web app and it works fine. But within this service, I have to call another WCF sevice (also hosted on a windows service) located on Server2. The security credentials are set to "Message" and "Username". I have an error like "SOAP protcol negociation failed". It's a problem with my server certificate public key that doesn't seem to be recognise. However, if I call the service on the Server2 from Server1 in a console app, it works fine. I followed this tutorial to set up my certificates : http://www.codeproject.com/KB/WCF/wcf_certificates.aspx Here's the config file from my service on Server1 that tries to call the second one : <endpoint address="" binding="wsHttpBinding" contract="Microsoft.ServiceModel.Samples.ITraitement" /> <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" /> </service> </services> <client> <endpoint address="http://Server2:8000/servicemodelsamples/service" behaviorConfiguration="myClientBehavior" binding="wsHttpBinding" bindingConfiguration="MybindingCon" contract="Microsoft.ServiceModel.Samples.ICalculator" name=""> <identity> <dns value="ODWCertificatServeur" /> </identity> </endpoint> </client> <bindings> <wsHttpBinding> <binding name="MybindingCon"> <security mode="Message"> <message clientCredentialType="UserName" /> </security> </binding> </wsHttpBinding> </bindings> <behaviors> <serviceBehaviors> <behavior name="ServiceTraitementBehavior"> <serviceMetadata httpGetEnabled="True"/> <serviceDebug includeExceptionDetailInFaults="True" /> </behavior> </serviceBehaviors> <endpointBehaviors> <behavior name="myClientBehavior"> <clientCredentials> <clientCertificate findValue="MachineServiceTraitement" x509FindType="FindBySubjectName" storeLocation="LocalMachine" storeName="My" /> <serviceCertificate> <authentication certificateValidationMode="ChainTrust" revocationMode="NoCheck"/> </serviceCertificate> </clientCredentials> </behavior> </endpointBehaviors> </behaviors> And here's the config file from the web app that calls the service on Server1 : <system.serviceModel> <bindings> <wsHttpBinding> <binding name="WSHttpBinding_ITraitement" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" bypassProxyOnLocal="false" transactionFlow="false" hostNameComparisonMode="StrongWildcard" maxBufferPoolSize="524288" maxReceivedMessageSize="65536" messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true" allowCookies="false"> <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" /> <reliableSession ordered="true" inactivityTimeout="00:10:00" enabled="false" /> <security mode="Message"> <transport clientCredentialType="Windows" proxyCredentialType="None" realm="" /> <message clientCredentialType="Windows" negotiateServiceCredential="true" algorithmSuite="Default" establishSecurityContext="true" /> </security> </binding> </wsHttpBinding> </bindings> <client> <endpoint address="http://localhost:8020/ServiceTraitementPC" binding="wsHttpBinding" bindingConfiguration="WSHttpBinding_ITraitement" contract="ITraitement" name="WSHttpBinding_ITraitement"> </endpoint> </client> Any idea why it works if if I call it in a console app and not from my service ? Maybe it has something to do with the certificateValidationMode="ChainTrust" ?

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  • ssl security information on internet explorer 6

    - by user309984
    Hi all, I dont want that my webpage show security information about this page contains both secure and nonsecure... this only happen in ie6, i am testing with the program ietester. I know that the problem is in file mootools-1.11-uncompressed.js in this line if(!$("ie_ready")){var C=(window.location.protocol=="https:")?"://0":"javascript:void(0);";document.write('<\/script');$("ie_ready").onreadystatechange=function(){if(this.readyState=="complete"){A();}};}}else{window.addListener("load",A);document.addListener("DOMContentLoaded",A); i already try change the ://0 by https://0 and javascript: and javascript:false and # but the problem continues, when i remove this line from the mootools file the warning doesnt show but the code that i have to show some calendar doesnt work also, because i have something like /* and this doesnt work if i remove that line, can anyone help me??

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  • What anti-keylogging programs can you use when using public PCs

    - by Jason Smith
    Are there anti-keylogging programs that can keep you safe while you are using a public PC terminal? Do they exist and what are these? I like to know that I am safe when entering data on a public PC for example from malware or keyloggers, who knows where it has been. Or else, how can I keep my personal data safe when using a public PC? I think this question is relevant for anyone who is concerned about their security on any level.

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  • How secure is a bluetooth keyboard against password sniffing?

    - by jhs
    In a situation where an admin will enter sensitive information into a keyboard (the root password), what is the risk that a bluetooth keyboard (ship by default with Mac systems these days) would put those passwords at risk? Another way of asking would be: what security and encryption protocols are used, if any, to establish a bluetooth connection between a keyboard and host system?

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  • Using an audio cable (or similar) to create unidirectional communication from a secure server

    - by makerofthings7
    I'm interested in exploring how a semi-offline Root CA can be used to update CRLs to the sub CA's. This answer on Security.SE mentions using an audio cable for this purpose. Doe anyone have details on how an Audio cable (or similar) can be used to create a unidirectional path of communication? Since I'm a .Net programmer, I'm also open to code samples, drivers, etc that may enable this scenario.

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