CVE-2017-6694 in Ultra Services Platform
Summary
by MITRE
A vulnerability in the Virtual Network Function Manager's (VNFM) logging function of Cisco Ultra Services Platform could allow an authenticated, local attacker to view sensitive data (cleartext credentials) on an affected system. More Information: CSCvd29355. Known Affected Releases: 21.0.v0.65839.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 12/27/2020
The vulnerability identified as CVE-2017-6694 represents a critical security flaw within Cisco's Ultra Services Platform Virtual Network Function Manager component. This issue stems from improper handling of sensitive information within the logging mechanisms of the VNFM system, creating an avenue for authenticated local attackers to gain unauthorized access to confidential data. The vulnerability specifically affects version 21.0.v0.65839 of the platform, making it a targeted concern for organizations utilizing this particular release. The flaw demonstrates a fundamental weakness in how the system manages and stores sensitive operational data, particularly credentials that are logged in cleartext format.
The technical exploitation of this vulnerability occurs through an authenticated local attacker who already possesses valid credentials to access the system. Once authenticated, the attacker can leverage the flawed logging function to extract cleartext credentials that are improperly stored within the system's log files. This represents a classic case of insecure logging practices where sensitive information is not adequately protected or encrypted during the logging process. The vulnerability falls under the category of information disclosure, specifically exposing credentials that should remain protected from unauthorized access. According to CWE standards, this aligns with CWE-200, which addresses the exposure of sensitive information to an unauthorized actor, and CWE-312, which covers the exposure of sensitive data through cleartext storage.
The operational impact of this vulnerability extends beyond simple credential theft, as it can lead to broader system compromise and unauthorized access to network functions. An attacker who successfully exploits this vulnerability can potentially escalate their privileges within the network service environment, gaining access to additional system resources and services that rely on the compromised credentials. The exposure of cleartext credentials creates a cascading security risk where a single compromised credential can potentially unlock multiple system components. This vulnerability directly impacts the principle of least privilege and can undermine the overall security posture of organizations relying on Cisco's Ultra Services Platform. The attack vector is particularly concerning because it requires only local authentication, meaning that an attacker who has already gained access to a system with legitimate credentials can exploit this weakness to escalate their access.
Mitigation strategies for this vulnerability should focus on immediate patching of the affected system to version 21.0.v0.65839 or later releases that contain the necessary security fixes. Organizations should also implement enhanced logging security measures including encryption of sensitive data within log files, regular monitoring of log access patterns, and strict access controls for log files. According to ATT&CK framework, this vulnerability relates to T1078 which covers valid accounts and T1552 which addresses credentials in files. The remediation process should include comprehensive log file auditing, implementation of secure logging practices, and regular security assessments of logging mechanisms. System administrators should also consider implementing additional monitoring controls to detect unauthorized access to sensitive log files and establish proper incident response procedures for credential exposure events.