Learn about CVE-2017-2630, a stack buffer overflow vulnerability in QEMU versions prior to 2.9. Understand the impact, affected systems, exploitation, and mitigation steps.
A vulnerability in the Quick Emulator (QEMU) prior to version 2.9 has been discovered, which relates to a stack buffer overflow in the Network Block Device (NBD) client support. The vulnerability may be triggered when the server responds to a 'NBD_OPT_LIST' request. If exploited by a malicious NBD server, this issue could cause a remote NBD client to crash, resulting in a Denial of Service (DoS) attack, or potentially allowing the execution of unauthorized code on the client host using the privileges of the QEMU process.
Understanding CVE-2017-2630
This section provides insights into the impact and technical details of CVE-2017-2630.
What is CVE-2017-2630?
CVE-2017-2630 is a stack buffer overflow vulnerability found in QEMU versions prior to 2.9, specifically in the NBD client support. It allows a malicious NBD server to crash a remote NBD client or execute unauthorized code on the client host.
The Impact of CVE-2017-2630
The vulnerability has the following impact:
Technical Details of CVE-2017-2630
This section delves into the technical aspects of the vulnerability.
Vulnerability Description
The flaw in QEMU's NBD client support allows a stack buffer overflow when processing a server's response to an 'NBD_OPT_LIST' request.
Affected Systems and Versions
Exploitation Mechanism
The vulnerability can be exploited by a malicious NBD server responding to specific requests, leading to a stack buffer overflow and potential DoS or code execution on the client host.
Mitigation and Prevention
Protecting systems from CVE-2017-2630 requires immediate actions and long-term security practices.
Immediate Steps to Take
Long-Term Security Practices
Patching and Updates