busybox busybox CVE-2021-42375 vulnerability in Busybox and Other Products
Published on November 15, 2021

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An incorrect handling of a special element in Busybox's ash applet leads to denial of service when processing a crafted shell command, due to the shell mistaking specific characters for reserved characters. This may be used for DoS under rare conditions of filtered command input.

Vendor Advisory Vendor Advisory NVD

Vulnerability Analysis

CVE-2021-42375 can be exploited with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Attack Vector:
LOCAL
Attack Complexity:
LOW
Privileges Required:
LOW
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
HIGH

Weakness Type

Improper Handling of Invalid Use of Special Elements

The product does not properly filter, remove, quote, or otherwise manage the invalid use of special elements in user-controlled input, which could cause adverse effect on its behavior and integrity.


Products Associated with CVE-2021-42375

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2021-42375 are published in these products:

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

Affected Versions

busybox:

Exploit Probability

EPSS
0.06%
Percentile
18.95%

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.