CVE-2019-9927 in Caret
Summary
by MITRE
Caret before 2019-02-22 allows Remote Code Execution.
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Analysis
by VulDB Data Team • 08/04/2023
The vulnerability identified as CVE-2019-9927 affects the Caret software version released prior to February 22, 2019, presenting a critical remote code execution flaw that enables attackers to execute arbitrary code on affected systems. This vulnerability stems from improper input validation within the software's processing mechanisms, creating a pathway for malicious actors to inject and execute unauthorized commands remotely. The flaw exists in the software's handling of user-supplied data, particularly in scenarios where the application fails to properly sanitize or validate input parameters before processing them.
The technical implementation of this vulnerability involves a classic buffer overflow condition or injection flaw that allows an attacker to manipulate the application's execution flow. When Caret processes certain input data, the software does not adequately validate or sanitize the incoming parameters, leading to a situation where crafted malicious input can bypass normal execution boundaries. This type of vulnerability typically maps to CWE-121, which describes stack-based buffer overflow conditions, or CWE-78, which covers OS command injection vulnerabilities. The exploitation mechanism likely involves crafting specific payloads that, when processed by the vulnerable software, result in arbitrary code execution with the privileges of the affected application.
From an operational perspective, the impact of this vulnerability is severe as it allows remote attackers to gain complete control over affected systems without requiring authentication. The vulnerability affects systems running Caret versions before the specified patch date, making it particularly dangerous for organizations that have not updated their software deployments. Attackers can leverage this flaw to install malware, establish persistent backdoors, exfiltrate sensitive data, or use the compromised systems as launch points for further attacks within the network. The remote nature of the vulnerability means that attackers can exploit it from anywhere on the internet, significantly expanding the potential attack surface.
The exploitation of CVE-2019-9927 aligns with several tactics described in the MITRE ATT&CK framework, particularly those related to initial access and execution phases. Attackers can use this vulnerability as part of their initial compromise strategy to gain a foothold in target environments, then progress through techniques such as privilege escalation and lateral movement. The vulnerability's classification as a remote code execution flaw places it in the execution category of ATT&CK, where adversaries seek to run malicious code on target systems. Organizations should implement immediate patch management procedures to address this vulnerability, as well as network segmentation and monitoring to detect potential exploitation attempts.
Mitigation strategies for this vulnerability center around immediate software patching and updating to versions released after February 22, 2019, which contain the necessary security fixes. System administrators should conduct comprehensive inventory checks to identify all affected Caret installations and prioritize their remediation. Network-based mitigations can include firewall rules that restrict access to vulnerable services, though this approach is less effective than patching. Organizations should also implement monitoring solutions to detect unusual command execution patterns that might indicate exploitation attempts. The vulnerability's nature suggests that input validation improvements and proper sanitization of user data should be prioritized in future development cycles to prevent similar issues. Additionally, implementing principle of least privilege access controls and regular security assessments can help reduce the overall risk exposure associated with such vulnerabilities.