CVE-2017-1000380 : What You Need to Know
Learn about CVE-2017-1000380, a vulnerability in the Linux kernel ALSA /dev/snd/timer driver allowing unauthorized access to user information. Find mitigation steps and update recommendations.
In versions of the Linux kernel prior to 4.11.5, a vulnerability exists in the ALSA /dev/snd/timer driver within the sound/core/timer.c file. This flaw allows local users to gain unauthorized access to information belonging to other users due to a data race.
Understanding CVE-2017-1000380
This CVE entry highlights a security issue in the Linux kernel that could lead to unauthorized information access.
What is CVE-2017-1000380?
The vulnerability in the ALSA /dev/snd/timer driver in the Linux kernel before version 4.11.5 enables local users to read information from other users, potentially exposing uninitialized memory contents.
The Impact of CVE-2017-1000380
The vulnerability allows local users to access information that belongs to other users due to a data race, potentially leading to a breach of confidentiality and unauthorized data disclosure.
Technical Details of CVE-2017-1000380
This section delves into the technical aspects of the CVE.
Vulnerability Description
The vulnerability in sound/core/timer.c in the Linux kernel before 4.11.5 results in a data race in the ALSA /dev/snd/timer driver, allowing local users to read information from other users.
Affected Systems and Versions
- Affected systems: Linux kernel versions prior to 4.11.5
- Affected component: ALSA /dev/snd/timer driver
Exploitation Mechanism
The vulnerability arises when a read and an ioctl operation occur simultaneously, potentially exposing uninitialized memory contents.
Mitigation and Prevention
Protecting systems from CVE-2017-1000380 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update the Linux kernel to version 4.11.5 or newer to mitigate the vulnerability
- Monitor and restrict access to sensitive information
Long-Term Security Practices
- Implement the principle of least privilege to limit user access
- Regularly audit and patch system components to prevent similar vulnerabilities
Patching and Updates
- Apply patches provided by the Linux kernel maintainers to address the vulnerability