Denial of service in Cisco Webex Teams client for Windows



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-3131
CWE-ID CWE-400
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Cisco Webex Teams
Client/Desktop applications / Office applications

Vendor Cisco Systems, Inc

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Resource exhaustion

EUVDB-ID: #VU24528

Risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-3131

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists in the Cisco Webex Teams client for Windows due to insufficient input validation when processing received adaptive cards. A remote authenticated attacker can send an adaptive card with malicious content and cause the targeted user's client to crash continuously.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Webex Teams: 3.0.13131

CPE2.3 External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-cards-dos-FWzNcXPq


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open a file.

Is there known malware, which exploits this vulnerability?

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



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