Microsoft Windows - Multiple Use-After-Free Issues in jscript Array Methods

!-- There are multiple use-after-free issues in Array methods in jscript. When jscript executes an Array method such as Array.join, it first retrieves the length of an array. If the input is not an array but an object, then the length property of the object is going to be retrieved and converted ...

Microsoft Windows - Multiple Use-After-Free Issues in jscript Array Methods Exploit

Exploit for windows platform in category dos / poc !-- There are multiple use-after-free issues in Array methods in jscript. When jscript executes an Array method such as Array.join, it first retrieves the length of an array. If the input is not an array but an object, then the length property of...

Microsoft Windows - Multiple Use-After-Free Issues in jscript Array Methods

Microsoft Windows - Multiple Use-After-Free Issues in jscript Array Methods !-- There are multiple use-after-free issues in Array methods in jscript. When jscript executes an Array method such as Array.join, it first retrieves the length of an array. If the input is not an array but an object, th...

Microsoft Windows jscript Use-After-Free

Windows: multiple use-after-free issues in jscript Array methods CVE-2018-0935 There are multiple use-after-free issues in Array methods in jscript. When jscript executes an Array method such as Array.join, it first retrieves the length of an array. If the input is not an array but an object, the...

DNSExfiltrator - Data exfiltration over DNS request covert channel

DNSExfiltrator allows for transfering exfiltrate a file over a DNS request covert channel. This is basically a data leak testing tool allowing to exfiltrate data over a covert channel. DNSExfiltrator has two sides: 1. The server side , coming as a single python script dnsexfiltrator.py, which act...

Data Exfiltration over DNS Request Covert Channel: DNSExfiltrator

DNSExfiltrator allows for transfering exfiltrate a file over a DNS request covert channel. This is basically a data leak testing tool allowing to exfiltrate data over a covert channel. DNSExfiltrator has two sides: 1. The server side , coming as a single python script dnsexfiltrator.py , which ac...

Microsoft Internet Explorer 11 - jscript!JSONStringifyObject Use-After-Free

Microsoft Internet Explorer 11 - jscript!JSONStringifyObject Use-After-Free var o1 = toJSON:function alert'o1'; return o2; var o2 = toJSON:function alert'o2'; CollectGarbage; return 'x'; JSON.stringifyo1; g df8.e48: Access violation - code c0000005 first chance First chance exceptions are reporte...

Microsoft Windows jscript!JsArraySlice Uninitialized Variable Exploit

Exploit for windows platform in category dos / poc Windows: Uninitialized variable in jscript!JsArraySlice CVE-2017-11855 There is an uninitialized variable vulnerability in jscript.dll. This issue could potentially be exploited through multiple vectors: - By opening a malicious web page in...

Microsoft Internet Explorer 11 - 'jscript!JSONStringifyObject' Use-After-Free

var o1 = toJSON:function alert'o1'; return o2; var o2 = toJSON:function alert'o2'; CollectGarbage; return 'x'; JSON.stringifyo1; g df8.e48: Access violation - code c0000005 first chance First chance exceptions are reported before any exception handling. This exception may be expected and handled...

Microsoft Windows - jscript!NameTbl::GetValDef Use-After-Free

Microsoft Windows - jscript!NameTbl::GetValDef Use-After-Free var vars = new Array100; forvar i=0;i !-- ============================================ PoC for WPAD might require page heap to trigger the crash: ============================================ function...

Microsoft Windows jscript!RegExpFncObj::LastParen Out-Of-Bounds Read

Windows: out-of-bounds read in jscript!RegExpFncObj::LastParen CVE-2017-11906 There is an out-of-bounds read in jscript.dll library used in IE, WPAD and other places: PoC for IE note: page heap might be required to obsorve the crash: ========================================= function go var r= ne...

Microsoft Windows - 'jscript!RegExpFncObj::LastParen' Out-of-Bounds Read

function go var r= new RegExpArray100.join''; ''.searchr; alertRegExp.lastParen; go; r rax=0000000000000063 rbx=000000000476fd90 rcx=0000000000000063 rdx=0000000000000064 rsi=000000000476fd90 rdi=000007fef23d37d0 rip=000007fef23d3813 rsp=00000000130f9090 rbp=00000000130f9148 r8=00000000130f9210...

aPAColypse now: Exploiting Windows 10 in a Local Network with WPAD/PAC and JScript

by Ivan Fratric, Thomas Dullien, James Forshaw and Steven Vittitoe Intro Many widely-deployed technologies, viewed through 20/20 hindsight, seem like an odd or unnecessarily risky idea. Engineering decisions in IT are often made with imperfect information and under time pressure, and some odditie...

WIndows jscript!JsArraySlice Uninitialized Variable

Windows: Uninitialized variable in jscript!JsArraySlice CVE-2017-11855 There is an uninitialized variable vulnerability in jscript.dll. This issue could potentially be exploited through multiple vectors: - By opening a malicious web page in Internet Explorer. - currently untested An attacker on t...

Microsoft Internet Explorer 11 jscript!JSONStringifyObject Use-After-Free

IE11: use-after-free in jscript!JSONStringifyObject CVE-2017-11793 There is a use-after-free in jscript.dll library that can be exploited in IE11. PoC: ========================================= var o1 = toJSON:function alert'o1'; return o2; var o2 = toJSON:function alert'o2'; CollectGarbage; retu...

Windows jscript!NameTbl::GetValDef Use-After-Free

Windows: use-after-free in jscript!NameTbl::GetValDef CVE-2017-11903 There is a use-after-free vulnerability in jscript.dll. This issue could potentially be exploited through multiple vectors: - An attacker on the local network could exploit this issue by posing as a WPAD Web Proxy Auto-Discovery...

WSC2 - A WebSocket C2 Tool

WSC2 is a PoC of using the WebSockets and a browser process to serve as a C2 communication channel between an agent, running on the target system, and a controller acting as the actuel C2 server. Background information Check this blog post to get some context and insight on the developpment of th...

Microsoft Internet Explorer 11 jscript!JsErrorToString Use-After-Free Exploit

Microsoft Internet Explorer 11 suffers from a use-after-free vulnerability in jscript!JsErrorToString. Microsoft IE11: use-after-free in jscript!JsErrorToString CVE-2017-11810 There is a use-after-free in jscript.dll library that can be exploited in IE11. jscript.dll is an old JavaScript library...

Microsoft Internet Explorer 11 jscript!JsErrorToString Use-After-Free

Microsoft IE11: use-after-free in jscript!JsErrorToString CVE-2017-11810 There is a use-after-free in jscript.dll library that can be exploited in IE11. jscript.dll is an old JavaScript library that was used in IE 8 and back. However, IE11 can still load it if put into IE8 compatibility mode and ...

Koadic - COM Command & Control Framework (JScript RAT)

Koadic, or COM Command & Control, is a Windows post-exploitation rootkit similar to other penetration testing tools such as Meterpreter and Powershell Empire. The major difference is that Koadic does most of its operations using Windows Script Host a.k.a. JScript/VBScript, with compatibility in t...