CVE-2021-42381: 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 hashinit function
Affected Software
Event History
Frequently Asked Questions
What is CVE-2021-42381?
CVE-2021-42381 is a vulnerability in Busybox's awk applet that can lead to denial of service and code execution when processing a crafted awk pattern in the hash_init function.
Which software is affected by CVE-2021-42381?
The following versions of Busybox are affected: 1:1.27.2-2ubuntu3.4, 1:1.30.1-4ubuntu6.4, 1:1.30.1-6ubuntu2.1, 1:1.30.1-6ubuntu3.1, 1:1.30.1-7ubuntu2, and 1.34.0.
How can CVE-2021-42381 be exploited?
CVE-2021-42381 can be exploited by processing a crafted awk pattern in the hash_init function of Busybox's awk applet.
What is the severity of CVE-2021-42381?
The severity of CVE-2021-42381 is not mentioned in the provided information.
How can I fix CVE-2021-42381?
To fix CVE-2021-42381, update Busybox to a version that includes the necessary fixes, such as version 1.35.0-4 or higher.