CVE-2017-2635 : What You Need to Know

An issue was discovered in libvirt, versions 2.5.0 to 3.0.0, involving the mishandling of empty drives, which could be exploited by a remote authenticated attacker to crash the libvirtd daemon, causing a denial of service.

Understanding CVE-2017-2635

This CVE involves a vulnerability in libvirt versions 2.5.0 to 3.0.0 that could lead to a denial of service attack.

What is CVE-2017-2635?

A flaw in libvirt versions 2.5.0 to 3.0.0 mishandles empty drives
Exploitable by a remote authenticated attacker
Allows for crashing the libvirtd daemon, resulting in a denial of service

The Impact of CVE-2017-2635

CVSS Base Score: 7.7 (High)
Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
Availability Impact: High
Scope: Changed

Technical Details of CVE-2017-2635

This section provides more in-depth technical details about the CVE.

Vulnerability Description

A NULL pointer deference flaw in libvirt versions 2.5.0 to 3.0.0
Allows a remote authenticated attacker to crash libvirtd daemon

Affected Systems and Versions

Affected Product: libvirt
Vendor: The libvirt Project
Affected Versions: 2.5.0 to 3.0.0

Exploitation Mechanism

Remote authenticated attacker exploits mishandling of empty drives
Triggers a crash in libvirtd daemon, leading to denial of service

Mitigation and Prevention

Protecting systems from CVE-2017-2635 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor patches and updates promptly
Monitor network traffic for any suspicious activity
Restrict network access to vulnerable systems

Long-Term Security Practices

Regularly update and patch software and systems
Implement strong authentication mechanisms
Conduct regular security audits and assessments

Patching and Updates

Update libvirt to versions beyond 3.0.0 to mitigate the vulnerability