CVE-2017-2620 : What You Need to Know

Quick Emulator (QEMU) before version 2.8 with Cirrus CLGD 54xx VGA Emulator support is vulnerable to an out-of-bounds access issue. An attacker with privileged access inside the guest system could exploit this flaw to crash the QEMU process or execute unauthorized code on the host system.

Understanding CVE-2017-2620

An out-of-bounds access vulnerability in QEMU versions prior to 2.8 with Cirrus CLGD 54xx VGA Emulator support.

What is CVE-2017-2620?

This CVE refers to a vulnerability in QEMU that allows an attacker with privileged access to potentially crash the QEMU process or execute unauthorized code on the host system.

The Impact of CVE-2017-2620

The vulnerability has a CVSS base score of 5.5, indicating a medium severity issue with high attack complexity and low availability impact. An attacker could exploit this flaw to compromise system integrity and confidentiality.

Technical Details of CVE-2017-2620

Details about the vulnerability, affected systems, and exploitation mechanisms.

Vulnerability Description

The vulnerability arises when copying VGA data in cirrus_bitblt_cputovideo in QEMU versions before 2.8, allowing for out-of-bounds access.

Affected Systems and Versions

Product: QEMU
Vendor: QEMU
Versions Affected: 2.8

Exploitation Mechanism

An attacker with privileged access inside the guest system can exploit the vulnerability to crash the QEMU process or execute unauthorized code on the host system.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2017-2620.

Immediate Steps to Take

Update QEMU to version 2.8 or above to mitigate the vulnerability.
Monitor vendor advisories and apply patches promptly.

Long-Term Security Practices

Implement the principle of least privilege to limit access rights for users and processes.
Regularly update and patch software to address known vulnerabilities.

Patching and Updates

Apply security patches provided by QEMU promptly to address the vulnerability and enhance system security.