#VU56029 Improper Cleanup on Thrown Exception in Cisco Expressway and Cisco TelePresence Video Communication Server - CVE-2021-34716

Vulnerability identifier: #VU56029

Vulnerability risk: Low

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

CVE-ID: CVE-2021-34716

CWE-ID: CWE-460

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco Expressway
Server applications / Conferencing, Collaboration and VoIP solutions
Cisco TelePresence Video Communication Server
Server applications / Other server solutions

Vendor: Cisco Systems, Inc

Description

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

The vulnerability exists due to incorrect handling of certain crafted software images that are uploaded to the affected device. A remote administrator can upload specially crafted software images and execute arbitrary code on the underlying operating system. 

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco Expressway: X8.6

Cisco TelePresence Video Communication Server: X8.6

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External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewrce-QPynNCjh

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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