CVE-2021-42373: Null Pointer Dereference
First published: Mon Nov 15 2021(Updated: )
A NULL pointer dereference in Busybox's man applet leads to denial of service when a section name is supplied but no page argument is given
Credit: reefs@jfrog.com 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 | ||
| All of | ||
| Netapp H300s Firmware | ||
| Netapp H300s | ||
| All of | ||
| Netapp H500s Firmware | ||
| Netapp H500s | ||
| All of | ||
| Netapp H700s Firmware | ||
| Netapp H700s | ||
| All of | ||
| Netapp H300e Firmware | ||
| Netapp H300e | ||
| All of | ||
| Netapp H500e Firmware | ||
| Netapp H500e | ||
| All of | ||
| Netapp H700e Firmware | ||
| Netapp H700e | ||
| All of | ||
| 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 the vulnerability ID?
The vulnerability ID is CVE-2021-42373.
What is the severity of CVE-2021-42373?
The severity of CVE-2021-42373 is medium.
Which software is affected by CVE-2021-42373?
Busybox versions 1.33.0 and 1.33.1, as well as Fedora versions 33 and 34, are affected by CVE-2021-42373.
How can a NULL pointer dereference in Busybox's man applet lead to denial of service?
When a section name is supplied but no page argument is given, a NULL pointer dereference in Busybox's man applet can lead to denial of service.
Is there a fix for CVE-2021-42373?
Yes, an update to a non-vulnerable version of Busybox or Fedora should fix CVE-2021-42373.
- agent/type
- collector/nvd-index
- agent/software-canonical-lookup-request
- agent/weakness
- agent/severity
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/first-publish-date
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/last-modified-date
- agent/author
- agent/softwarecombine
- agent/tags
- agent/event
- 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