QID 375711

Date Published: 2021-07-20

QID 375711: Linux systemd Denial of Service Vulnerability

systemd is a software suite that is included in most Linux-based OSes. It provides an array of system components for Linux operating systems. It provides a system and service manager that runs as PID 1 and starts the rest of the system.

The Qualys Research Team has discovered a stack exhaustion denial-of-service vulnerability in systemd, a near-ubiquitous utility available on major Linux operating systems.

This vulnerability was introduced in systemd v220 (April 2015) by commit 7410616c ("core: rework unit name validation and manipulation logic"), which replaced a strdup() in the heap with a strdupa() on the stack.

Successful exploitation of this vulnerability allows any unprivileged user to cause denial of service via kernel panic.

  • CVSS V3 rated as Medium - 5.5 severity.
  • CVSS V2 rated as Medium - 4.9 severity.
    • Solution
    Upgrade to the latest packages which contain a patch.

    Vendor References

    CVEs related to QID 375711

    CVE-2021-33910 |
    Software Advisories
    Advisory ID Software Component Link
    SYSTEMD URL Logo github.com/systemd/systemd
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