CVE-2019-11884 : Exploit Details and Defense Strategies

A local user can potentially access confidential information from the kernel stack memory in the Linux kernel before version 5.0.15.

Understanding CVE-2019-11884

This CVE describes a vulnerability in the Linux kernel that could allow a local user to obtain sensitive information from the kernel stack memory.

What is CVE-2019-11884?

The vulnerability arises from the do_hidp_sock_ioctl function in net/bluetooth/hidp/sock.c in the Linux kernel before version 5.0.15. By using the HIDPCONNADD command, a local user can access confidential data from the kernel stack memory when a name field lacks a '\0' character.

The Impact of CVE-2019-11884

The exploitation of this vulnerability could lead to unauthorized access to sensitive information stored in the kernel stack memory, potentially compromising system security and confidentiality.

Technical Details of CVE-2019-11884

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The do_hidp_sock_ioctl function in the Linux kernel before version 5.0.15 allows a local user to obtain potentially sensitive information from kernel stack memory via a HIDPCONNADD command due to a missing '\0' character in the name field.

Affected Systems and Versions

Linux kernel versions before 5.0.15 are affected by this vulnerability.

Exploitation Mechanism

The vulnerability can be exploited by a local user executing the HIDPCONNADD command to access confidential information from the kernel stack memory.

Mitigation and Prevention

Protecting systems from CVE-2019-11884 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by the Linux kernel to mitigate the vulnerability.
Monitor system logs for any suspicious activities that could indicate exploitation attempts.
Limit user privileges to reduce the impact of potential attacks.

Long-Term Security Practices

Regularly update the Linux kernel to the latest stable version to ensure all security patches are applied.
Conduct regular security audits and penetration testing to identify and address vulnerabilities proactively.

Patching and Updates

Stay informed about security advisories and updates released by Linux distributions and apply them promptly to safeguard systems.