CVE-2021-33910 : What You Need to Know
Discover the impact of CVE-2021-33910, a memory allocation vulnerability in systemd prior to versions 246.15, 247.8, 248.5, and 249.1, allowing a local attacker to crash the operating system.
A memory allocation vulnerability has been discovered in systemd prior to versions 246.15, 247.8, 248.5, and 249.1. This vulnerability could be exploited by a local attacker to cause an operating system crash.
Understanding CVE-2021-33910
This section will cover the details and impact of CVE-2021-33910.
What is CVE-2021-33910?
basic/unit-name.c in systemd has a memory allocation issue involving strdupa and alloca, allowing a local attacker to crash the operating system.
The Impact of CVE-2021-33910
The vulnerability could be exploited by a local attacker to crash the operating system, leading to a denial of service.
Technical Details of CVE-2021-33910
This section will delve into the technical aspects of the vulnerability.
Vulnerability Description
The vulnerability in systemd allows a local attacker to trigger an operating system crash through memory allocation.
Affected Systems and Versions
Systems running systemd versions prior to 246.15, 247.8, 248.5, and 249.1 are affected by this vulnerability.
Exploitation Mechanism
An attacker can exploit this vulnerability by manipulating memory allocation functions strdupa and alloca in basic/unit-name.c.
Mitigation and Prevention
Learn how to protect your system from CVE-2021-33910.
Immediate Steps to Take
Update systemd to versions 246.15, 247.8, 248.5, or 249.1 to mitigate the vulnerability and prevent system crashes.
Long-Term Security Practices
Regularly update your system's packages and use security best practices to safeguard against similar vulnerabilities.
Patching and Updates
Stay informed about security advisories and apply patches promptly to ensure your system is protected.