The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity
Low
AC
The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required
High
PR
The attacker requires privileges that provide significant (e.g., administrative) control over the vulnerable system allowing full access to the vulnerable system’s settings and files.
User Interaction
None
UI
The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
Scope
Unchanged
S
An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality
High
C
There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity
High
I
There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability
High
A
There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
Cisco Webex Player T29.10 - '.ARF' Out-of-Bounds Memory Corruption#####################################################################################
# Application: Cisco Webex Player
# Platforms: Windows
# Versions: Cisco Webex Meeting Player version T29.10
# Author: Francis Provencher of COSIG
# Website: https://cosig.gouv.qc.ca/en/advisory/
# Twitter: @COSIG_
# Date: August 31, 2016
# CVE: CVE-2016-1415
# COSIG-2016-34
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1) Introduction
2) Report Timeline
3) Technical details
4) POC
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1) Introduction
===================
Cisco WebEx, formerly WebEx Communications Inc. is a company that provides on-demand collaboration, online meeting, web conferencing and videoconferencing applications. Its products include Meeting Center, Training Center, Event Center, Support Center, Sales Center, MeetMeNow, PCNow, WebEx AIM Pro Business Edition, WebEx WebOffice, and WebEx Connect. All WebEx products are part of the Cisco collaboration portfolio. All Cisco WebEx products are offered by Cisco Systems Inc.
(https://en.wikipedia.org/wiki/WebEx)
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2) Report Timeline
===================
2016-05-25: Francis Provencher of COSIG report the vulnerability to Cisco PSIRT
2016-06-07: Cisco PSIRT confirm the vulnerability
2016-08-09: Cisco fixed the issue
2016-08-09: Advisory released
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160831-meetings-player
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===================
3) Technical details
===================
The flaw exists within the parsing process of an invalid ARF file. An attacker can use this flaw to create an out-of-bound memory corruption which could allow for the execution of arbitrary code in the context of the current process.
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4) POC
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https://cosig.gouv.qc.ca/wp-content/uploads/2016/09/COSIG-2016-34.zip
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