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
8.8 High
AI Score
Confidence
High
0.896 High
EPSS
Percentile
98.8%
#####################################################################################
# Application: Adobe Flash Player
# Platforms: Windows,OSX
# Versions: 23.0.0.162 and earlier
# Author: Francis Provencher of COSIG
# Website: https://cosig.gouv.qc.ca/en/advisory/
# Twitter: @COSIG_
# Date: October 11, 2016
# CVE-2016-4273
# COSIG-2016-35
#####################################################################################
1) Introduction
2) Report Timeline
3) Technical details
4) POC
#####################################################################################
================
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)
#####################################################################################
============================
2) Rapport de Coordination
============================
2016-05-17: Francis Provencher of COSIG report this vulnerability to Adobe PSIRT;
2016-05-23: Adobe PSIRT confirm this vulnerability;
2016-10-11: Adobe publish a patch (APSB16-32);
2016-10-11: Advisory released by COSIG;
#####################################################################################
=====================
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 โout of boundโ memory corruption. A file with an โActionRecordโ
structure that contain an invalid โConstantPoolโ could lead to remote code execution in the context of the current user.
#####################################################################################
===========
4) POC:
===========
https://cosig.gouv.qc.ca/wp-content/uploads/2016/10/COSIG-2016-35.zip
https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/40510.zip
####################################################################################
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
8.8 High
AI Score
Confidence
High
0.896 High
EPSS
Percentile
98.8%