CVE-2017-7273 : Security Advisory and Response

A vulnerability in the cp_report_fixup function in the Linux kernel versions 3.2 and 4.x before 4.9.4 could allow attackers in close physical proximity to trigger an integer underflow, leading to denial of service or other unspecified impacts.

Understanding CVE-2017-7273

This CVE entry describes a flaw in the Linux kernel that could be exploited by attackers physically near the target system.

What is CVE-2017-7273?

The cp_report_fixup function in the Linux kernel versions 3.2 and 4.x before 4.9.4 is susceptible to exploitation by attackers in close physical proximity. By triggering an integer underflow, attackers can cause a denial of service. Additionally, attackers could potentially achieve other impacts by using a manipulated HID report.

The Impact of CVE-2017-7273

The vulnerability could result in a denial of service condition or other unspecified impacts when exploited by attackers in close physical proximity to the affected system.

Technical Details of CVE-2017-7273

This section provides more technical insights into the vulnerability.

Vulnerability Description

The cp_report_fixup function in drivers/hid/hid-cypress.c in the Linux kernel 3.2 and 4.x before 4.9.4 allows physically proximate attackers to cause a denial of service (integer underflow) or possibly have unspecified other impact via a crafted HID report.

Affected Systems and Versions

Linux kernel versions 3.2 and 4.x before 4.9.4

Exploitation Mechanism

Attackers need to be in close physical proximity to the target system to exploit this vulnerability. By triggering an integer underflow or utilizing a manipulated HID report, they can cause a denial of service or other impacts.

Mitigation and Prevention

Protecting systems from CVE-2017-7273 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply relevant patches provided by the Linux kernel maintainers
Monitor and restrict physical access to vulnerable systems

Long-Term Security Practices

Implement network segmentation to limit exposure
Regularly update and patch systems to address known vulnerabilities

Patching and Updates

Ensure that the affected systems are updated with the latest patches released by the Linux kernel maintainers to mitigate the CVE-2017-7273 vulnerability.