Adobe Flash Player 24.0.0.186 - 'ActionGetURL2' Out-of-Bounds Memory Corruption (2)

2017-01-1100:00:00

COSIG

www.exploit-db.com

9.3 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:M/Au:N/C:C/I:C/A:C

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

9.5 High

AI Score

Confidence

High

0.954 High

EPSS

Percentile

99.4%

JSON

Source: https://cosig.gouv.qc.ca/en/cosig-2017-01-en/

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# Application: Adobe Flash Player
# Platforms: Windows,OSX
# Versions: 24.0.0.186 and earlier
# Author: Francis Provencher of COSIG
# Website: https://cosig.gouv.qc.ca/en/advisory/
# Twitter: @COSIG_
# Date: January 10, 2017
# CVE-2017-2930
# COSIG-2016-35

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1) Introduction
2) Report Timeline
3) Technical details
4) POC

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================
1) Introduction
================

Adobe Flash Player (labeled Shockwave Flash in Internet Explorer and Firefox) is a freeware software for using content created
on the Adobe Flash platform, including viewing multimedia, executing rich Internet applications, and streaming video and audio.
Flash Player can run from a web browser as a browser plug-in or on supported mobile devices.[7] Flash Player was created by Macromedia
and has been developed and distributed by Adobe Systems since Adobe acquired Macromedia.

(https://en.wikipedia.org/wiki/Adobe_Flash_Player)

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============================
2) Rapport de Coordination
============================

2016-11-13: Francis Provencher of COSIG report this vulnerability to Adobe PSIRT;
2016-11-14: Adobe PSIRT confirm this vulnerability;
2017-01-10: Adobe publish a patch (APSB17-02);
2017-01-10: Advisory released by COSIG;

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=====================
3) Technical details
=====================

The vulnerability allows a remote attacker to execute malicious code or access to a part of the dynamically allocated memory using a user interaction
visiting a Web page or open a specially crafted SWF file, an attacker is able to create an “out of bound” memory corruption. A file with an “ActionRecord”
structure that contain an invalid value in “ActionGetURL2” could lead to remote code execution in the context of the current user.

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===========
4) POC:
===========

https://cosig.gouv.qc.ca/wp-content/uploads/2017/01/COSIG-2017-01.zip
https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/41012.zip

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