CVE-2015-5134 Detail

CVE-2015-5134

EPSS

53.45%V3

Vector

Network

Published

2015-08-13
23h00 +00:00

Modified

2018-01-04
18h57 +00:00

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CVE Descriptions

Use-after-free vulnerability in Adobe Flash Player before 18.0.0.232 on Windows and OS X and before 11.2.202.508 on Linux, Adobe AIR before 18.0.0.199, Adobe AIR SDK before 18.0.0.199, and Adobe AIR SDK & Compiler before 18.0.0.199 allows attackers to execute arbitrary code via unspecified vectors, a different vulnerability than CVE-2015-5127, CVE-2015-5130, CVE-2015-5539, CVE-2015-5540, CVE-2015-5550, CVE-2015-5551, CVE-2015-5556, CVE-2015-5557, CVE-2015-5559, CVE-2015-5561, CVE-2015-5563, CVE-2015-5564, and CVE-2015-5565.

CVE Informations

Metrics

Metrics	Score	Severity	CVSS Vector	Source
V2	10		AV:N/AC:L/Au:N/C:C/I:C/A:C	[email protected]

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.

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Exploit information

Exploit Database EDB-ID : 37852

Publication date : 2015-08-18 22h00 +00:00
Author : Google Security Research
EDB Verified : Yes

Source: https://code.google.com/p/google-security-research/issues/detail?id=355&can=1&q=label%3AProduct-Flash%20modified-after%3A2015%2F8%2F17&sort=id In certain cases where a native AS2 class sets an internal variable, it can lead to a use-after-free if the variable is a SharedObject. While this example shows setting NetConnection.contentType, this applies to several other variables including many proprties of the Sound and NetStream classes. A proof of concept is as follows: var s = SharedObject.getLocal("test"); ASSetPropFlags(s, null, 0, 0xff); ASSetPropFlags(s.data, null, 0, 0xff); var o = {myprop: "test", myprop2: "test"}; s.data.contentType = o; flush(); ASnative(2100, 200)(s.data); // new NetConnection trace(s.data.contentType); s = 1; //Do GC for(var i = 0; i < 100; i++){ var b = new flash.display.BitmapData(100, 1000, true, 1000); } setInterval(c, 1000); function c(){ ASnative(252, 1).call(o); //Array push } A fla, an AS file and two swfs are attached. donotdelete.fla compiles to donotdelete.swf and contains the code that causes the use-after-free. loadswf.as compiles to loadswf.swf, and sets up the heap to cause a crash. To make the issue occur, put loadswf.swf and donotdelete.swf in the same folder on a webserver (the PoCs don't always work locally due to flash network sandboxing), and load loadswf.swf. This PoC only works on 64-bit systems, but the issue would work on a 32-bit system with proper heap set-up. Proof of Concept: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/37852.zip