Linux Kernel - Privilege Escalation, Denial of Service, and Information Leak
Summary
DSA-3290-1: linux - security update. Affects linux versions < 3.2.68-1+deb7u2. Fixed in 3.2.68-1+deb7u2. How to fix ↓
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Background
The Linux kernel is the core component of the Linux operating system. It provides essential functionality and interfaces for various hardware devices, file systems, and system services. The kernel is responsible for managing system resources, executing processes, and ensuring security. However, several vulnerabilities have been discovered in the Linux kernel that can lead to privilege escalation, denial of service, information leaks, and data corruption.
Vulnerability Detail
One of the vulnerabilities, identified as CVE-2015-1805, affects the pipe iovec read and write implementations. These implementations may iterate over the iovec twice but modify the iovec in a way that the second iteration accesses the wrong memory. This flaw can be exploited by a local user to crash the system, potentially escalate privileges, and cause data corruption and information leaks in pipes between non-malicious processes. Another vulnerability, CVE-2015-3636, allows users with permission to create ping sockets to crash the system and, on 32-bit architectures, potentially escalate privileges. However, by default, no users on a Debian system have access to ping sockets. Additionally, CVE-2015-4167 affects the UDF implementation, where a missing length check can be exploited by a local user with mount device privileges to crash the system.
How To Fix
Minimum fixed version
3.2.68-1+deb7u2
This is the first release that contains the fix.
sudo apt-get install --only-upgrade linuxTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Conclusion
Upgrading the Linux packages to the recommended versions will address the identified vulnerabilities in the Linux kernel. It is important to stay updated with security patches and follow best practices to ensure the security and stability of your system. For further assistance or support in vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The vulnerabilities can lead to system crashes, privilege escalation, data corruption, and information leaks.
Users of Debian 7 (wheezy) and Debian 8 (jessie) distributions running the Linux kernel are affected.
No specific workarounds are mentioned for these vulnerabilities.
You can use vulnerability monitoring tools like Vulert to check if your system is affected by these vulnerabilities.
You can refer to the Debian Security Advisory DSA-3290-1 for more details on these vulnerabilities.
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