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Fixed: Security Vulnerabilities allowing authentication to be bypassed (discovered by Kyle Neideck)

This commit is contained in:
Taloth Saldono 2017-12-07 19:40:52 +01:00
parent 195a761c29 5fae2ac66f
commit 581320e3a4
6 changed files with 110 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/NzbDrone.Api/Extensions/Pipelines/CacheHeaderPipeline.cs
View File

@ -23,6 +23,8 @@ namespace NzbDrone.Api.Extensions.Pipelines
private void Handle(NancyContext context)
{
if (context.Request.Method == "OPTIONS") return;
if (_cacheableSpecification.IsCacheable(context))
{
context.Response.Headers.EnableCache();

46
src/NzbDrone.Api/Extensions/Pipelines/CorsPipeline.cs
View File

@ -2,6 +2,7 @@
using System.Linq;
using Nancy;
using Nancy.Bootstrapper;
using NzbDrone.Common.Extensions;
namespace NzbDrone.Api.Extensions.Pipelines
{
@ -11,10 +12,25 @@ namespace NzbDrone.Api.Extensions.Pipelines
public void Register(IPipelines pipelines)
{
pipelines.AfterRequest.AddItemToEndOfPipeline((Action<NancyContext>) Handle);
pipelines.BeforeRequest.AddItemToEndOfPipeline(HandleRequest);
pipelines.AfterRequest.AddItemToEndOfPipeline(HandleResponse);
}
private void Handle(NancyContext context)
private Response HandleRequest(NancyContext context)
{
if (context == null || context.Request.Method != "OPTIONS")
{
return null;
}
var response = new Response()
.WithStatusCode(HttpStatusCode.OK)
.WithContentType("");
ApplyResponseHeaders(response, context.Request);
return response;
}
private void HandleResponse(NancyContext context)
{
if (context == null || context.Response.Headers.ContainsKey(AccessControlHeaders.AllowOrigin))
{
@ -26,22 +42,40 @@ namespace NzbDrone.Api.Extensions.Pipelines
private static void ApplyResponseHeaders(Response response, Request request)
{
var allowedMethods = "GET, OPTIONS, PATCH, POST, PUT, DELETE";
if (request.IsApiRequest())
{
// Allow Cross-Origin access to the API since it's protected with the apikey, and nothing else.
ApplyCorsResponseHeaders(response, request, "*", "GET, OPTIONS, PATCH, POST, PUT, DELETE");
}
else if (request.IsSharedContentRequest())
{
// Allow Cross-Origin access to specific shared content such as mediacovers and images.
ApplyCorsResponseHeaders(response, request, "*", "GET, OPTIONS");
}
// Disallow Cross-Origin access for any other route.
}
private static void ApplyCorsResponseHeaders(Response response, Request request, string allowOrigin, string allowedMethods)
{
response.Headers.Add(AccessControlHeaders.AllowOrigin, allowOrigin);
if (request.Method == "OPTIONS")
{
if (response.Headers.ContainsKey("Allow"))
{
allowedMethods = response.Headers["Allow"];
}
var requestedHeaders = string.Join(", ", request.Headers[AccessControlHeaders.RequestHeaders]);
response.Headers.Add(AccessControlHeaders.AllowOrigin, "*");
response.Headers.Add(AccessControlHeaders.AllowMethods, allowedMethods);
if (request.Headers[AccessControlHeaders.RequestHeaders].Any())
{
var requestedHeaders = request.Headers[AccessControlHeaders.RequestHeaders].Join(", ");
response.Headers.Add(AccessControlHeaders.AllowHeaders, requestedHeaders);
}
}
}
}
}

3
src/NzbDrone.Api/Extensions/Pipelines/GZipPipeline.cs
View File

@ -33,7 +33,8 @@ namespace NzbDrone.Api.Extensions.Pipelines
try
{
if (
!response.ContentType.Contains("image")
response.Contents != Response.NoBody
&& !response.ContentType.Contains("image")
&& !response.ContentType.Contains("font")
&& request.Headers.AcceptEncoding.Any(x => x.Contains("gzip"))
&& !AlreadyGzipEncoded(response)

6
src/NzbDrone.Api/Extensions/RequestExtensions.cs
View File

@ -36,5 +36,11 @@ namespace NzbDrone.Api.Extensions
{
return request.Path.StartsWith("/Content/", StringComparison.InvariantCultureIgnoreCase);
}
public static bool IsSharedContentRequest(this Request request)
{
return request.Path.StartsWith("/MediaCover/", StringComparison.InvariantCultureIgnoreCase) ||
request.Path.StartsWith("/Content/Images/", StringComparison.InvariantCultureIgnoreCase);
}
}
}

5
src/NzbDrone.Api/Frontend/Mappers/StaticResourceMapper.cs
View File

@ -1,3 +1,4 @@
using System;
using System.IO;
using NLog;
using NzbDrone.Common.Disk;
@ -28,7 +29,9 @@ namespace NzbDrone.Api.Frontend.Mappers
public override bool CanHandle(string resourceUrl)
{
return resourceUrl.StartsWith("/Content") ||
resourceUrl = resourceUrl.ToLowerInvariant();
return resourceUrl.StartsWith("/content") ||
resourceUrl.EndsWith(".js") ||
resourceUrl.EndsWith(".map") ||
resourceUrl.EndsWith(".css") ||

54
src/NzbDrone.Integration.Test/CorsFixture.cs
View File

@ -8,19 +8,26 @@ namespace NzbDrone.Integration.Test
[TestFixture]
public class CorsFixture : IntegrationTest
{
private RestRequest BuildRequest()
private RestRequest BuildGet(string route = "series")
{
var request = new RestRequest("series");
var request = new RestRequest(route, Method.GET);
request.AddHeader(AccessControlHeaders.RequestMethod, "POST");
return request;
}
private RestRequest BuildOptions(string route = "series")
{
var request = new RestRequest(route, Method.OPTIONS);
return request;
}
[Test]
public void should_not_have_allow_headers_in_response_when_not_included_in_the_request()
{
var request = BuildRequest();
var response = RestClient.Get(request);
var request = BuildOptions();
var response = RestClient.Execute(request);
response.Headers.Should().NotContain(h => h.Name == AccessControlHeaders.AllowHeaders);
}
@ -28,10 +35,10 @@ namespace NzbDrone.Integration.Test
[Test]
public void should_have_allow_headers_in_response_when_included_in_the_request()
{
var request = BuildRequest();
var request = BuildOptions();
request.AddHeader(AccessControlHeaders.RequestHeaders, "X-Test");
var response = RestClient.Get(request);
var response = RestClient.Execute(request);
response.Headers.Should().Contain(h => h.Name == AccessControlHeaders.AllowHeaders);
}
@ -39,8 +46,8 @@ namespace NzbDrone.Integration.Test
[Test]
public void should_have_allow_origin_in_response()
{
var request = BuildRequest();
var response = RestClient.Get(request);
var request = BuildOptions();
var response = RestClient.Execute(request);
response.Headers.Should().Contain(h => h.Name == AccessControlHeaders.AllowOrigin);
}
@ -48,10 +55,37 @@ namespace NzbDrone.Integration.Test
[Test]
public void should_have_allow_methods_in_response()
{
var request = BuildRequest();
var response = RestClient.Get(request);
var request = BuildOptions();
var response = RestClient.Execute(request);
response.Headers.Should().Contain(h => h.Name == AccessControlHeaders.AllowMethods);
}
[Test]
public void should_not_have_allow_methods_in_non_options_request()
{
var request = BuildGet();
var response = RestClient.Execute(request);
response.Headers.Should().NotContain(h => h.Name == AccessControlHeaders.AllowMethods);
}
[Test]
public void should_have_allow_origin_in_non_options_request()
{
var request = BuildGet();
var response = RestClient.Execute(request);
response.Headers.Should().Contain(h => h.Name == AccessControlHeaders.AllowOrigin);
}
[Test]
public void should_not_have_allow_origin_in_non_api_request()
{
var request = BuildGet("../abc");
var response = RestClient.Execute(request);
response.Headers.Should().NotContain(h => h.Name == AccessControlHeaders.AllowOrigin);
}
}
}