#VU25808 Input validation error in Cisco Systems, Inc products - CVE-2020-3127

Vulnerability identifier: #VU25808

Vulnerability risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-3127

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
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

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 39.5.17

Cisco Webex Meetings Online: before 1.3.43

Cisco WebEx Meetings Server: before 3.0MR3 patch 1

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

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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.