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CVE-2017-12337: A vulnerability in the upgrade mechanism of Cisco collaboration products based on the Cisco Voice Operating…

CVE-2017-12337 is rated critical with a CVSS v3.0 base score of 9.8 and NVD lists 11 affected products, including Cisco Emergency Responder. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.

Vulnerability description

A vulnerability in the upgrade mechanism of Cisco collaboration products based on the Cisco Voice Operating System software platform could allow an unauthenticated, remote attacker to gain unauthorized, elevated access to an affected device. The vulnerability occurs when a refresh upgrade (RU) or Prime Collaboration Deployment (PCD) migration is performed on an affected device. When a refresh upgrade or PCD migration is completed successfully, an engineering flag remains enabled and could allow root access to the device with a known password. If the vulnerable device is subsequently upgraded using the standard upgrade method to an Engineering Special Release, service update, or a new major release of the affected product, this vulnerability is remediated by that action. Note: Engineering Special Releases that are installed as COP files, as opposed to the standard upgrade method, do not remediate this vulnerability. An attacker who can access an affected device over SFTP while it is in a vulnerable state could gain root access to the device. This access could allow the attacker to compromise the affected system completely. Cisco Bug IDs: CSCvg22923, CSCvg55112, CSCvg55128, CSCvg55145, CSCvg58619, CSCvg64453, CSCvg64456, CSCvg64464, CSCvg64475, CSCvg68797.

Severity breakdown

CVSS v3.0 9.8: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
Attack complexity: Low. No special conditions; the attack can be repeated reliably.
Privileges required: None. No account or prior access is needed.
User interaction: None. No action from any user is needed.
Scope: Unchanged. Impact stays within the vulnerable component.
Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
Availability impact: High. Total loss of availability; the component can be shut down.

Underlying weakness

CWE-287: Improper Authentication

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

Affected products

Cisco Emergency Responder: all versions listed by NVD
Cisco Finesse: all versions listed by NVD
Cisco Hosted Collaboration Solution: all versions listed by NVD
Cisco Mediasense: all versions listed by NVD
Cisco Prime License Manager: all versions listed by NVD
Cisco Socialminer: all versions listed by NVD
Cisco Unified Communications Manager: all versions listed by NVD
Cisco Unified Communications Manager Im And Presence Service: all versions listed by NVD
Cisco Unified Contact Center Express: all versions listed by NVD
Cisco Unified Intelligence Center: all versions listed by NVD
Cisco Unity Connection: all versions listed by NVD