Multiple vulnerabilities in Cisco Expressway Series and TelePresence Video Communication Server

Published: 2021-08-23

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-34715 CVE-2021-34716
CWE-ID	CWE-347 CWE-460
Exploitation vector	Network
Public exploit	N/A
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

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper Verification of Cryptographic Signature

EUVDB-ID: #VU56028

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-2021-34715

CWE-ID: CWE-347 - Improper Verification of Cryptographic Signature

Exploit availability: No

Description

The vulnerability allows a remote user to compromise the target system.

The vulnerability exists due to insufficient validation of the content of upgrade packages. A remote administrator can upload a malicious archive to the Upgrade page and execute arbitrary code on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Expressway: X8.8

Cisco TelePresence Video Communication Server: X8.8

CPE2.3

External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewver-c6WZPXRx

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.

2) Improper Cleanup on Thrown Exception

EUVDB-ID: #VU56029

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 - Improper Cleanup on Thrown Exception