SB2021082303 - Multiple vulnerabilities in Cisco Expressway Series and TelePresence Video Communication Server
Published: August 23, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Improper Verification of Cryptographic Signature (CVE-ID: CVE-2021-34715)
CWE-ID: CWE-347 - Improper Verification of Cryptographic Signature
CVSSv4: 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
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.
2) Improper Cleanup on Thrown Exception (CVE-ID: CVE-2021-34716)
CWE-ID: CWE-460 - Improper Cleanup on Thrown Exception
CVSSv4: 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
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.
Remediation
Install update from vendor's website.