CVE-2017-6667 in Context Service SDK
Summary
by MITRE
A vulnerability in the update process for the dynamic JAR file of the Cisco Context Service software development kit (SDK) could allow an unauthenticated, remote attacker to execute arbitrary code on the affected device with the privileges of the web server. More Information: CSCvb66730. Known Affected Releases: 2.0.
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Analysis
by VulDB Data Team • 10/16/2019
The vulnerability identified as CVE-2017-6667 resides within the Cisco Context Service software development kit where a flaw exists in the dynamic jar file update mechanism. This represents a critical security weakness that enables unauthenticated remote code execution, fundamentally compromising the integrity and confidentiality of affected systems. The vulnerability specifically targets version 2.0 of the SDK, making it a version-specific issue that requires immediate attention from organizations utilizing this particular release.
The technical flaw manifests during the update process of dynamic jar files, where insufficient input validation and authentication mechanisms allow attackers to manipulate the update procedure. This weakness falls under the category of insecure update mechanisms and can be categorized as CWE-502, which deals with deserialization of untrusted data, or more specifically CWE-494, involving the download of code from an untrusted source. The vulnerability permits an attacker to upload and execute arbitrary code on the target device with web server privileges, effectively providing a backdoor for malicious activities.
The operational impact of this vulnerability is severe and far-reaching, as it allows remote attackers to gain unauthorized access to systems without requiring any credentials or prior access. The attacker can execute commands with the privileges of the web server, which typically provides elevated access to system resources and potentially allows for further lateral movement within the network. This vulnerability directly aligns with ATT&CK technique T1059, which covers command and scripting interpreter, and T1078, which involves valid accounts for lateral movement. The exploitation of this vulnerability could result in complete system compromise, data exfiltration, and potential use as a foothold for additional attacks.
Organizations should implement immediate mitigations including upgrading to a patched version of the Cisco Context Service SDK, as version 2.0 is specifically affected. Network segmentation and firewall rules should be implemented to restrict access to affected systems, particularly those running the SDK. Regular security audits and monitoring of update processes should be conducted to detect any unauthorized modifications. Additionally, organizations should consider implementing intrusion detection systems that can identify suspicious update activities and anomalous code execution patterns. The vulnerability demonstrates the critical importance of secure update mechanisms and proper authentication controls in software development frameworks, as highlighted by industry standards that emphasize the need for secure software development lifecycle practices.