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CVE-2024-20253

Cisco Unified Communications Manager remote code execution

9.9 CRITICALEPSS 2.40%
  1. Published26 Jan 2024

Description

A vulnerability in multiple Cisco Unified Communications and Contact Center Solutions products could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device. This vulnerability is due to the improper processing of user-provided data that is being read into memory. An attacker could exploit this vulnerability by sending a crafted message to a listening port of an affected device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system with the privileges of the web services user. With access to the underlying operating system, the attacker could also establish root access on the affected device.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:H

Affected products

Cisco Unified Communications Manager≥ 14.0 < 14su3 · < 12.5\(1\)su8
Cisco Unified Communications Manager Im And Presence Service≥ 14.0 < 14.0su3 · < 12.5\(1\)su8
Cisco Unified Contact Center Express12.5\(1\)
Cisco Unity Connection≥ 14.0 < 14su3 · < 12.5\(1\)su8
Cisco Virtualized Voice Browser12.5\(1\) · 12.6\(1\) · 12.6\(2\)

Remediation

Fixed in
Cisco Unified Communications Manager≥ 14su3
Cisco Unified Communications Manager Im And Presence Service≥ 14.0su3
Cisco Unity Connection≥ 14su3

Frequently asked

Is CVE-2024-20253 being actively exploited?

CVE-2024-20253 is not in the CISA KEV catalog. Its EPSS exploit probability is 2.40%.

How severe is CVE-2024-20253?

CVE-2024-20253 has a CVSS 3.1 base score of 9.9, rated critical. EPSS estimates a 2.40% probability of exploitation.

Which products are affected by CVE-2024-20253?

Affected products include Cisco Unified Communications Manager, Cisco Unified Communications Manager Im And Presence Service, Cisco Unified Contact Center Express, Cisco Unity Connection, Cisco Virtualized Voice Browser.

How do I fix CVE-2024-20253?

Upgrade affected software to a fixed version, for example Cisco Unified Communications Manager 14su3, Cisco Unified Communications Manager Im And Presence Service 14.0su3, Cisco Unity Connection 14su3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2024-20253 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.