CVE-2017-12284 in Jabber
Summary
by MITRE
A vulnerability in the web interface of Cisco Jabber for Windows Client could allow an authenticated, local attacker to retrieve user profile information, which could lead to the disclosure of confidential information. The vulnerability is due to a lack of input- and validation-checking mechanisms in the system. An attacker could exploit this vulnerability by issuing specific commands after authenticating to the system. A successful exploit could allow the attacker to view profile information where only certain parameters should be visible. Cisco Bug IDs: CSCve14401.
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Analysis
by VulDB Data Team • 01/19/2021
The vulnerability identified as CVE-2017-12284 resides within the web interface of Cisco Jabber for Windows Client, representing a critical security flaw that undermines the confidentiality of user data. This weakness stems from insufficient input validation mechanisms that fail to properly sanitize or verify user-supplied data before processing. The vulnerability specifically affects the authentication and authorization controls within the client application, creating an avenue for malicious actors to exploit the system's trust model. The flaw manifests when an authenticated user attempts to access restricted profile information through crafted commands, bypassing normal access controls that should limit data visibility to authorized parameters only.
The technical exploitation of this vulnerability requires an attacker to first establish legitimate authentication credentials within the Cisco Jabber environment, which significantly reduces the attack surface but does not eliminate the risk entirely. Once authenticated, the attacker can issue specially crafted commands that exploit the input validation gap, allowing unauthorized access to user profile data that should remain protected. This type of vulnerability falls under the category of insufficient input validation as classified by CWE-20, which represents one of the most common and dangerous software weaknesses in cybersecurity. The vulnerability demonstrates a clear failure in the principle of least privilege, where the application does not properly enforce access controls on sensitive data elements that are part of user profiles.
The operational impact of this vulnerability extends beyond simple data exposure, as it could enable attackers to gather comprehensive user information including personal details, contact information, and potentially sensitive communication metadata. This type of information disclosure could facilitate further attacks such as social engineering campaigns, credential harvesting, or targeted phishing attempts that leverage the exposed profile data. The vulnerability's presence in a widely deployed collaboration client like Cisco Jabber creates significant risk for organizations that rely on the application for business communications, as it could provide attackers with valuable intelligence for lateral movement within networks. Organizations using Cisco Jabber for Windows Client may experience cascading security implications when user profile information is compromised, particularly in environments where the application integrates with other enterprise systems.
Mitigation strategies for CVE-2017-12284 should prioritize immediate patch deployment from Cisco, as the vendor has acknowledged this issue through Bug ID CSCve14401 and provided remediation guidance. Network administrators should implement strict access controls and monitor authentication logs for unusual command patterns that might indicate exploitation attempts. The vulnerability's classification under CWE-20 suggests that defensive measures should include comprehensive input validation frameworks, parameterized queries, and strict authorization checks that prevent unauthorized data access. Organizations should also consider implementing security monitoring solutions that can detect anomalous behavior patterns in authenticated sessions, particularly when users attempt to access data elements that are outside their normal operational parameters. The ATT&CK framework categorizes this vulnerability under privilege escalation and credential access tactics, making it essential for security teams to review their incident response procedures and ensure proper detection capabilities are in place to identify potential exploitation attempts.