QID 38850

Date Published: 2021-10-21

QID 38850: Cisco Expressway Series and TelePresence Video Communication Server Image Verification Vulnerability (cisco-sa-ewver-c6WZPXRx)

A vulnerability in the image verification function of Cisco Expressway Series and
Cisco TelePresence Video Communication Server (VCS) could
allow an authenticated, remote attacker to execute code with internal user privileges on the underlying operating system.

Affected Products
Cisco Expressway Series and Cisco TelePresence VCS if they were running a release
from x8.8 Prior to 14.0.3 release. Note: This vulnerability was introduced when support for
validation of SHA512 checksums was introduced in Release X8.8.

QID Detection Logic (Unauthenticated):
The check matches version of Cisco TelePresence Video Communication Server Expressway on the exposed banner information under the SIP banner.

A successful exploit could allow the attacker to execute code with user-level privileges (the _nobody account) on the underlying operating system.

  • CVSS V3 rated as High - 7.2 severity.
  • CVSS V2 rated as Critical - 9 severity.
    • Solution

    Customers are advised to refer to cisco-sa-ewver-c6WZPXRx for more information.

    Vendor References

    CVEs related to QID 38850

    CVE-2021-34715 |
    Software Advisories
    Advisory ID Software Component Link
    cisco-sa-ewver-c6WZPXRx URL Logo tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewver-c6WZPXRx
    By selecting these links, you may be leaving CVEreport webspace. We have provided these links to other websites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other websites that are more appropriate for your purpose. CVEreport does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, CVEreport does not endorse any commercial products that may be mentioned on these sites. Please address comments about any linked pages to [email protected].