busybox busybox CVE-2021-42377 vulnerability in Busybox and Other Products
Published on November 15, 2021

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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.

Vendor Advisory Vendor Advisory NVD

Weakness Type

Free of Memory not on the Heap

The application calls free() on a pointer to memory that was not allocated using associated heap allocation functions such as malloc(), calloc(), or realloc(). When free() is called on an invalid pointer, the program's memory management data structures may become corrupted. This corruption can cause the program to crash or, in some circumstances, an attacker may be able to cause free() to operate on controllable memory locations to modify critical program variables or execute code.


Products Associated with CVE-2021-42377

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2021-42377 are published in these products:

Busybox
 
Fedora Project Fedora
 
NetApp Cloud Backup
 
NetApp Hci Management Node
 
NetApp Solidfire
 

Affected Versions

busybox:

Exploit Probability

EPSS
2.86%
Percentile
86.02%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.