CVE-2021-42377
First published: Mon Nov 15 2021(Updated: )
An attacker-controlled pointer free in Busybox's hush applet leads to denial of service and possible code execution when processing a crafted shell command, due to the shell mishandling the &&& string. This may be used for remote code execution under rare conditions of filtered command input.
Credit: reefs@jfrog.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Busybox Busybox | =1.33.0 | |
| Busybox Busybox | =1.33.1 | |
| Fedoraproject Fedora | =33 | |
| Fedoraproject Fedora | =34 | |
| Netapp Cloud Backup | ||
| Netapp Hci Management Node | ||
| Netapp Solidfire | ||
| Netapp H300s Firmware | ||
| Netapp H300s | ||
| Netapp H500s Firmware | ||
| Netapp H500s | ||
| Netapp H700s Firmware | ||
| Netapp H700s | ||
| Netapp H300e Firmware | ||
| Netapp H300e | ||
| Netapp H500e Firmware | ||
| Netapp H500e | ||
| Netapp H700e Firmware | ||
| Netapp H700e | ||
| Netapp H410s Firmware | ||
| Netapp H410s |
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Reference Links
- https://claroty.com/team82/research/unboxing-busybox-14-vulnerabilities-uncovered-by-claroty-jfrog
- https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6T2TURBYYJGBMQTTN2DSOAIQGP7WCPGV/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UQXGOGWBIYWOIVXJVRKHZR34UMEHQBXS/
- https://security.netapp.com/advisory/ntap-20211223-0002/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQXGOGWBIYWOIVXJVRKHZR34UMEHQBXS/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6T2TURBYYJGBMQTTN2DSOAIQGP7WCPGV/
Frequently Asked Questions
What is CVE-2021-42377?
CVE-2021-42377 is a vulnerability in Busybox's hush applet that can lead to denial of service and possible code execution.
Which software versions are affected by CVE-2021-42377?
CVE-2021-42377 affects Busybox version 1.33.0 and 1.33.1, as well as Fedora versions 33 and 34.
What is the severity of CVE-2021-42377?
CVE-2021-42377 has a severity score of 9.8 (critical).
How can CVE-2021-42377 be exploited?
CVE-2021-42377 can be exploited by an attacker sending a crafted shell command containing the &&& string.
Are there any fixes or patches available for CVE-2021-42377?
Yes, patches and fixes are available for CVE-2021-42377. It is recommended to update to a patched version of Busybox or the affected software.
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- agent/author
- agent/softwarecombine
- agent/description
- agent/event
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- collector/mitre-cve
- source/MITRE
- vendor/busybox
- canonical/busybox busybox
- version/busybox busybox/1.33.0
- version/busybox busybox/1.33.1
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/33
- version/fedoraproject fedora/34
- vendor/netapp
- canonical/netapp cloud backup
- canonical/netapp hci management node
- canonical/netapp solidfire
- canonical/netapp h300s firmware
- canonical/netapp h300s
- canonical/netapp h500s firmware
- canonical/netapp h500s
- canonical/netapp h700s firmware
- canonical/netapp h700s
- canonical/netapp h300e firmware
- canonical/netapp h300e
- canonical/netapp h500e firmware
- canonical/netapp h500e
- canonical/netapp h700e firmware
- canonical/netapp h700e
- canonical/netapp h410s firmware
- canonical/netapp h410s