#VU59877 NULL pointer dereference in BusyBox


Published: 2022-01-20

Vulnerability identifier: #VU59877

Vulnerability risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-42376

CWE-ID: CWE-476

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
BusyBox
Universal components / Libraries / Software for developers

Vendor: busybox.net

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in Busybox's hush applet when processing a crafted shell command with a \x03 delimiter character. A local user can pass specially crafted string to the affected applet and crash the application.

Mitigation
Install update from vendor's website.

Vulnerable software versions

BusyBox: 1.16.0 - 1.33.1


CPE

External links
http://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6T2TURBYYJGBMQTTN2DSOAIQGP7WCPGV/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UQXGOGWBIYWOIVXJVRKHZR34UMEHQBXS/
http://security.netapp.com/advisory/ntap-20211223-0002/


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?


Latest bulletins with this vulnerability