Vulnerability · Published Aug 18, 2021 · Assigned by cisco

CVE-2021-34715Cisco Expressway Series and TelePresence Video Communication Server Image Verification Vulnerability

Medium 4.7

In plain English

A medium-severity security flaw in Cisco TelePresence Video Communication Server (VCS) Expressway from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 65% of all known vulnerabilities).

Severity (CVSS 3.1)4.7Medium

Exploit odds (30 days)1.1%top 35.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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. The vulnerability is due to insufficient validation of the content of upgrade packages. An attacker could exploit this vulnerability 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.

Affected products (as reported)

Vendor	Product	Versions
Cisco	Cisco TelePresence Video Communication Server (VCS) Expressway	n/a

Weakness: CWE-347 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

References

20210818 Cisco Expressway Series and TelePresence Video Communication Server Image Verification Vulnerability vendor-advisory, x_refsource_CISCO