CVE-2022-1055 : What You Need to Know
Learn about CVE-2022-1055, a critical use-after-free vulnerability in the Linux Kernel affecting versions past v5.1-rc1. Find out the impact, technical details, and mitigation strategies.
A detailed overview of CVE-2022-1055 highlighting the impact, technical details, and mitigation strategies.
Understanding CVE-2022-1055
CVE-2022-1055 is a vulnerability in the Linux Kernel that allows a local attacker to gain privilege escalation through a use-after-free issue in tc_new_tfilter. The exploit requires unprivileged user namespaces.
What is CVE-2022-1055?
CVE-2022-1055 is a use-after-free vulnerability in the Linux Kernel that could be exploited by a local attacker to escalate privileges. The vulnerability exists in tc_new_tfilter.
The Impact of CVE-2022-1055
The impact of CVE-2022-1055 is rated as MEDIUM severity with a CVSS base score of 6.3. It has a high impact on confidentiality and integrity, requiring low privileges for exploitation.
Technical Details of CVE-2022-1055
This section covers the vulnerability description, affected systems and versions, as well as the exploitation mechanism.
Vulnerability Description
A use-after-free flaw exists in the Linux Kernel in tc_new_tfilter, allowing a local attacker to achieve privilege escalation. The vulnerability is triggered by unprivileged user namespaces.
Affected Systems and Versions
The affected product is the Linux Kernel with versions greater than v5.1-rc1, specifically up to the 'next of v5.1-rc1'.
Exploitation Mechanism
The exploit for CVE-2022-1055 requires unprivileged user namespaces, allowing a local attacker to manipulate memory resources and escalate privileges.
Mitigation and Prevention
In this section, we discuss immediate steps to take and long-term security practices to safeguard systems against CVE-2022-1055.
Immediate Steps to Take
- Upgrade the Linux Kernel past commit 04c2a47ffb13c29778e2a14e414ad4cb5a5db4b5.
Long-Term Security Practices
- Regularly update the Linux Kernel to the latest stable version to mitigate known vulnerabilities.
Patching and Updates
Stay informed about security patches and updates released by Linux Kernel maintainers to address CVE-2022-1055 and other vulnerabilities.