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
Subscribe
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

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

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

External links

http://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

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-34716

CWE-ID: CWE-460 - Improper Cleanup on Thrown Exception

Exploit availability: No

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

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewrce-QPynNCjh


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.



###SIDEBAR###