CVE-2017-15289 : Exploit Details and Defense Strategies
Learn about CVE-2017-15289 affecting Qemu. Discover how local OS guest users can exploit mode4and5 write functions to cause denial of service attacks. Find mitigation steps and prevention measures.
CVE-2017-15289 was published on October 16, 2017, and affects Qemu. The vulnerability allows local OS guest privileged users to cause a denial of service attack by exploiting the mode4and5 write functions in hw/display/cirrus_vga.c within Qemu.
Understanding CVE-2017-15289
This CVE entry describes a vulnerability in Qemu that can be exploited by local OS guest privileged users to crash the Qemu process through out-of-bounds write access.
What is CVE-2017-15289?
The vulnerability in the mode4and5 write functions in Qemu's hw/display/cirrus_vga.c allows attackers to manipulate vectors related to dst calculation, leading to a denial of service attack.
The Impact of CVE-2017-15289
The exploitation of this vulnerability can result in a Qemu process crash, potentially disrupting virtual machine operations and causing downtime.
Technical Details of CVE-2017-15289
This section provides more technical insights into the vulnerability.
Vulnerability Description
The mode4and5 write functions in hw/display/cirrus_vga.c in Qemu enable local OS guest privileged users to trigger a denial of service by exploiting vectors associated with dst calculation.
Affected Systems and Versions
- Product: N/A
- Vendor: N/A
- Version: N/A
Exploitation Mechanism
The vulnerability can be exploited by local OS guest privileged users through the manipulation of vectors related to dst calculation, resulting in out-of-bounds write access and a subsequent crash of the Qemu process.
Mitigation and Prevention
Protecting systems from CVE-2017-15289 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply patches provided by the vendor promptly.
- Monitor vendor channels for security advisories and updates.
- Restrict access to vulnerable systems.
Long-Term Security Practices
- Regularly update and patch software to mitigate known vulnerabilities.
- Implement the principle of least privilege to limit user access rights.
- Conduct regular security audits and assessments.
Patching and Updates
Ensure that the latest patches and updates from Qemu or relevant vendors are applied to address the CVE-2017-15289 vulnerability.