CVE-2021-42386: Use After Free
A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the nvalloc function
Affected Software
Event History
Frequently Asked Questions
What is CVE-2021-42386?
CVE-2021-42386 is a vulnerability that exists in Busybox's awk applet and can lead to denial of service and possibly code execution.
How does CVE-2021-42386 work?
CVE-2021-42386 is a use-after-free vulnerability that occurs when processing a crafted awk pattern in the nvalloc function of Busybox's awk applet.
What is the severity of CVE-2021-42386?
The severity of CVE-2021-42386 is not specified in the provided information.
Which software is affected by CVE-2021-42386?
Busybox versions 1.30.1-7ubuntu2, 1.34.0, 1.27.2-2ubuntu3.4, 1.30.1-4ubuntu6.4, 1.30.1-6ubuntu2.1, 1.30.1-6ubuntu3.1, and 1.35.0-4 to 1.36.1-3.1 are affected by CVE-2021-42386.
How can I fix CVE-2021-42386?
Apply the recommended updates provided by the relevant software vendors (e.g., Ubuntu, Debian) to ensure you are using a fixed version of Busybox.