PT-2021-7441 · Cisco · Cisco Expressway Series+1

Hermes Bojaxhi + 1 · Published 2021-08-18 · Updated 2021-08-25 · CVE-2021-34715

Positive Technologies (AI Summary)

CVSS v2.0

9.0

High

Base vector

AV:N/AC:L/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) (affected versions not specified)

Description A vulnerability in the image verification function could allow an authenticated, remote attacker to execute code with internal user privileges on the underlying operating system. The issue is due to insufficient validation of the content of upgrade packages. An attacker could exploit this by uploading a malicious archive to the "Upgrade page" of the administrative web interface. A successful exploit could allow the attacker to execute code with user-level privileges (the nobody account) on the underlying operating system.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Verification of Cryptographic Signature

Weakness Enumeration

CWE-347

Related Identifiers

BDU:2022-06334

CVE-2021-34715

Affected Products

Cisco Expressway Series

Cisco Telepresence Video Communication Server

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2021-34715 · Security Note
• https://bdu.fstec.ru/vul/2022-06334 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewver-c6WZPXRx · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-34715 · Vendor Advisory
• https://t.me/cvenotify/19687 · Telegram Post
• https://t.me/cvenotify/19669 · Telegram Post
• https://t.me/cibsecurity/27572 · Telegram Post