Remote code execution in Cisco Webex Meetings



Published: 2020-03-06
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-3127
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Cisco Webex Meetings
Server applications / Conferencing, Collaboration and VoIP solutions

Cisco Webex Meetings Online
Server applications / Conferencing, Collaboration and VoIP solutions

Cisco WebEx Meetings Server
Server applications / Conferencing, Collaboration and VoIP solutions

Vendor Cisco Systems, Inc

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Input validation error

EUVDB-ID: #VU25808

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-3127

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists in Cisco Webex Network Recording Player for Windows and Cisco Webex Player for Windows due to insufficient validation of certain elements within a Webex recording that is stored in either the Advanced Recording Format (ARF) or the Webex Recording Format (WRF). A remote attacker can trick victim to open a specially crafted ARF or WRF file and execute arbitrary code on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Webex Meetings: before 40.0

Cisco Webex Meetings Online: before 1.3.43

Cisco WebEx Meetings Server: before 4.0MR2 patch 2

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200304-webex-player
http://www.zerodayinitiative.com/advisories/ZDI-20-269/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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