From baec5a4316d598f38184492ea20baf27baae6ed1 Mon Sep 17 00:00:00 2001
From: yallie <yallie@yandex.ru>
Date: Thu, 26 Apr 2018 17:36:04 +0300
Subject: [PATCH] MIT license.

---
 LICENSE   | 21 +++++++++++++++++++++
 README.md | 42 ++++++++++++++++++++++++++++++++++++++----
 2 files changed, 59 insertions(+), 4 deletions(-)
 create mode 100644 LICENSE

diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..e5500b0
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018 Alexey Yakovlev
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/README.md b/README.md
index 946f94e..f49e062 100644
--- a/README.md
+++ b/README.md
@@ -1,23 +1,57 @@
 # Deserializing the untrusted data is dangerous
 
-This tiny library tries to fix several known BinaryFormatter vulnerabilities.  
+It's proven that deserialing arbitrary payloads under certain conditions can
+trigger code execution. BinaryFormatter, DataContractSerializer, XmlSerializer,
+as well as several widely used JSON serializers are known to be vulnerable.
+
 See [ysoserial.net](https://github.com/pwntester/ysoserial.net) project for details.
 
+This tiny library tries to fix several known BinaryFormatter vulnerabilities.
+When a malicious payload is detected, the library throws an exception instead of
+deserializing the data. 
+
 [![appveyor](https://ci.appveyor.com/api/projects/status/github/zyanfx/safedeserializationhelpers?svg=true)](https://ci.appveyor.com/project/yallie/safedeserializationhelpers)
 [![tests](https://img.shields.io/appveyor/tests/yallie/safedeserializationhelpers.svg)](https://ci.appveyor.com/project/yallie/safedeserializationhelpers/build/tests)
 
 # Code sample
 
 ```csharp
-// bad: deserialization can trigger arbitrary code execution
+// unsafe: deserialization can trigger arbitrary code execution
 var fmt = new BinaryFormatter();
 var object = fmt.Deserialize(stream);
 
-// better: deserialization is checked against known vulnerabilities
+// safe: deserialization is guarded against known vulnerabilities
 var fmt = new BinaryFormatter().Safe();
 var object = fmt.Deserialize(stream);
 ```
 
 # Usage
 
-TODO: publish a Nuget package
\ No newline at end of file
+TODO: publish a Nuget package
+
+# Known vulnerabilities supported by the library
+
+* **ActivitySurrogateSelector** gadget by James Forshaw (loads an assembly and executes arbitrary code).
+* **PSObject** gadget by Oleksandr Mirosh and Alvaro Munoz. Target must run a system not patched for CVE-2017-8565.
+* **TypeConfuseDelegate** gadget by James Forshaw (runs any process using Process.Start delegate).
+* **DataSet** gadget by James Forshaw (unsafe BinaryFormatter deserialization).
+* **WindowsIdentity** gadget by Levi Broderick (unsafe BinaryFormatter deserialization).
+
+# References
+
+* [Exploiting .NET Managed DCOM](https://googleprojectzero.blogspot.com/2017/04/exploiting-net-managed-dcom.html) by James Forshaw
+* [Are you my Type?](https://media.blackhat.com/bh-us-12/Briefings/Forshaw/BH_US_12_Forshaw_Are_You_My_Type_WP.pdf) by James Forshaw
+* [Attacking .NET serialization](https://speakerdeck.com/pwntester/attacking-net-serialization) by Alvaro Munoz
+* [ysoserial.net](https://github.com/pwntester/ysoserial.net) exploit collection by Alvaro Munoz
+
+# Thanks
+
+* [Markus Wulftange](https://github.com/mwulftange) — for bringing up the problem to my attention
+* [James Forshaw](https://github.com/tyranid) — for the great blog posts, papers and talks on the subject
+* [Alvaro Munoz](https://github.com/pwntester) — for the awesome educational ysoserial.net project
+* [Chris Frohoff](https://github.com/frohoff) — for the original ysoserial Java project
+* [Levi Broderick](https://github.com/GrabYourPitchforks), Oleksandr Mirosh — for more malicious gadgets
+
+# License
+
+MIT License.