CVE-2017-3797 in WebEx Meetings Server
Summary
by MITRE
A vulnerability in Cisco WebEx Meetings Server could allow an unauthenticated, remote attacker to view the fully qualified domain name of the Cisco WebEx administration server. More Information: CSCvb60655. Known Affected Releases: 2.7.
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Analysis
by VulDB Data Team • 05/14/2026
The vulnerability identified as CVE-2017-3797 represents a significant information disclosure flaw within Cisco WebEx Meetings Server version 2.7. This vulnerability falls under the category of insecure direct object reference and information exposure, which are commonly classified under CWE-200 and CWE-425 respectively. The issue stems from the server's improper handling of certain HTTP requests that reveal sensitive domain information without requiring authentication. Attackers can exploit this weakness to obtain the fully qualified domain name of the Cisco WebEx administration server, which constitutes a critical piece of reconnaissance information for potential attackers. The vulnerability was documented under Cisco bug ID CSCvb60655 and specifically affects the 2.7 release of the WebEx Meetings Server software.
The technical exploitation of this vulnerability occurs through unauthenticated remote access to the WebEx Meetings Server, making it particularly dangerous as it requires no prior credentials or privileged access to the system. When an attacker sends specifically crafted requests to the vulnerable server, the system inadvertently responds with the complete domain name of the administration server. This information disclosure vulnerability allows attackers to gain knowledge about the internal network structure and potentially identify other targets within the same administrative domain. The flaw essentially exposes the underlying infrastructure details that should remain hidden from external parties, creating opportunities for further attacks such as targeted phishing or additional reconnaissance activities. The vulnerability is categorized under the MITRE ATT&CK framework as part of the credential access and reconnaissance phases, specifically relating to information gathering techniques.
The operational impact of CVE-2017-3797 extends beyond simple information disclosure, as it provides attackers with crucial infrastructure intelligence that can be leveraged in more sophisticated attacks. The revealed domain name can be used to construct targeted attacks against the administration server or to map out network topology for future exploitation attempts. This vulnerability particularly affects organizations that rely heavily on WebEx for enterprise communications, as it exposes the administrative infrastructure to potential attackers. The risk is amplified because the vulnerability affects a core component of Cisco's collaboration platform, which many organizations use for both internal and external communications. Organizations with this vulnerability present a potential attack surface that could be exploited to gain further access to their networks or to conduct social engineering attacks against their employees. The exposure of administrative domain names can also lead to additional security issues such as DNS enumeration attacks or targeted credential harvesting.
Mitigation strategies for CVE-2017-3797 primarily involve applying the official Cisco security patches and updates released to address this specific vulnerability. Organizations should immediately upgrade their WebEx Meetings Server installations to versions that have been patched against this issue. Network segmentation and access controls should be implemented to limit exposure of the WebEx server to untrusted networks, while firewall rules should be configured to restrict access to the server's administrative interfaces. Regular security assessments and vulnerability scanning should be conducted to identify similar information disclosure vulnerabilities within the network infrastructure. Additionally, implementing proper monitoring and logging of access attempts to administrative services can help detect exploitation attempts. Organizations should also consider implementing network intrusion detection systems to identify and alert on suspicious traffic patterns that may indicate exploitation of this vulnerability. The vulnerability's classification under CWE-200 and its potential impact on network security make it essential for organizations to maintain up-to-date security practices and to regularly review their infrastructure for similar exposure risks.