CVE-2018-6651 Explained : Impact and Mitigation
Learn about CVE-2018-6651, a vulnerability in uncurl software version 0.07 and earlier, impacting Parsec version 140-3. Attackers can exploit this flaw to bypass access restrictions and gain complete control over the targeted system.
A vulnerability in the uncurl software version 0.07 and earlier, also affecting Parsec version 140-3, allows remote attackers to bypass access restrictions, potentially leading to complete control over the targeted system.
Understanding CVE-2018-6651
This CVE entry describes a security issue in the uncurl software that could be exploited by attackers to gain unauthorized control over a computer system.
What is CVE-2018-6651?
The vulnerability lies in the uncurl_ws_accept function in uncurl.c, where inadequate validation of the Origin header for WebSocket API requests can be manipulated by attackers to circumvent access controls.
The Impact of CVE-2018-6651
The vulnerability enables remote attackers to bypass intended access restrictions by exploiting a substring match in the Origin header, potentially granting them complete control over the targeted computer within the context of Parsec.
Technical Details of CVE-2018-6651
This section provides more technical insights into the vulnerability.
Vulnerability Description
The function uncurl_ws_accept in uncurl.c of the software uncurl version 0.07 and earlier, utilized in Parsec version 140-3, lacks proper validation of the Origin header when handling WebSocket API requests.
Affected Systems and Versions
- Software: uncurl version 0.07 and earlier
- Also affects: Parsec version 140-3
Exploitation Mechanism
Attackers can exploit the vulnerability by manipulating the Origin header in WebSocket API requests to bypass access restrictions and potentially gain complete control over the targeted system.
Mitigation and Prevention
Protecting systems from this vulnerability requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update to the latest version of uncurl and Parsec to mitigate the vulnerability.
- Implement network-level controls to restrict access to vulnerable components.
Long-Term Security Practices
- Regularly monitor and audit WebSocket API requests for suspicious activities.
- Educate users on safe browsing practices to prevent potential attacks.
Patching and Updates
- Stay informed about security updates for uncurl and Parsec to apply patches promptly and enhance system security.