CVE-2021-42376: Null Pointer Dereference
A NULL pointer dereference in Busybox's hush applet leads to denial of service when processing a crafted shell command, due to missing validation after a \x03 delimiter character. This may be used for DoS under very rare conditions of filtered command input.
Affected Software
Event History
Frequently Asked Questions
What is CVE-2021-42376?
CVE-2021-42376 is a vulnerability in Busybox's hush applet that can lead to denial of service when processing a crafted shell command.
What is the severity of CVE-2021-42376?
The severity of CVE-2021-42376 is medium, with a severity value of 5.5.
Which software is affected by CVE-2021-42376?
Busybox versions from 1.16.0 to 1.34.0, Fedora 33, Fedora 34, Netapp Cloud Backup, Netapp HCI Management Node, Netapp Solidfire.
How can CVE-2021-42376 be exploited?
CVE-2021-42376 can be exploited by sending a crafted shell command that triggers a NULL pointer dereference in Busybox's hush applet.
Are there any references for CVE-2021-42376?
Yes, here are some references for CVE-2021-42376: [link 1](https://claroty.com/team82/research/unboxing-busybox-14-vulnerabilities-uncovered-by-claroty-jfrog), [link 2](https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/), [link 3](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6T2TURBYYJGBMQTTN2DSOAIQGP7WCPGV/)