First published: Mon Nov 15 2021(Updated: )
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
Credit: reefs@jfrog.com reefs@jfrog.com reefs@jfrog.com
Affected Software | Affected Version | How to fix |
---|---|---|
Busybox Busybox | >=1.16.0<=1.33.1 | |
Fedoraproject Fedora | =33 | |
Fedoraproject Fedora | =34 | |
debian/busybox | <=1:1.30.1-6 | 1:1.35.0-4 1:1.36.1-9 |
>=1.16.0<=1.33.1 | ||
=33 | ||
=34 |
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CVE-2021-42386 is a vulnerability that exists in Busybox's awk applet and can lead to denial of service and possibly code execution.
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.
The severity of CVE-2021-42386 is not specified in the provided information.
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.
Apply the recommended updates provided by the relevant software vendors (e.g., Ubuntu, Debian) to ensure you are using a fixed version of Busybox.