Quantum Secular Labs / Blog / Advisories
CVE-2017-6709: Cisco Ultra Services Framework: Authentication bypass
CVE-2017-6709 is rated critical with a CVSS v3.0 base score of 9.8 and affects Cisco Ultra Services Framework. 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 AutoVNF tool for the Cisco Ultra Services Framework could allow an unauthenticated, remote attacker to access administrative credentials for Cisco Elastic Services Controller (ESC) and Cisco OpenStack deployments in an affected system. The vulnerability exists because the affected software logs administrative credentials in clear text for Cisco ESC and Cisco OpenStack deployment purposes. An attacker could exploit this vulnerability by accessing the AutoVNF URL for the location where the log files are stored and subsequently accessing the administrative credentials that are stored in clear text in those log files. This vulnerability affects all releases of the Cisco Ultra Services Framework prior to Releases 5.0.3 and 5.1. Cisco Bug IDs: CSCvc76659.
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-200: Exposure of Sensitive Information to an Unauthorized Actor
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
CWE-522: Insufficiently Protected Credentials
The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval.
CWE-532: Insertion of Sensitive Information into Log File
The product writes sensitive information to a log file.
Affected products
- Cisco Ultra Services Framework: up to and including 5.0.2