Bug 2023895 (CVE-2021-42377) - CVE-2021-42377 busybox: an attacker-controlled pointer free in hush applet leads to denial of service and possible code execution when processing a crafted shell command
Summary: CVE-2021-42377 busybox: an attacker-controlled pointer free in hush applet le...
Keywords:
Status: NEW
Alias: CVE-2021-42377
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Nobody
QA Contact:
URL:
Whiteboard:
Depends On: 2023896
Blocks: 2023944
TreeView+ depends on / blocked
 
Reported: 2021-11-16 18:39 UTC by Guilherme de Almeida Suckevicz
Modified: 2023-07-07 08:35 UTC (History)
5 users (show)

Fixed In Version: BusyBox 1.34.0
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in BusyBox, where it did not properly sanitize while processing a crafted shell command, leading to a denial of service and possible code execution. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
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Description Guilherme de Almeida Suckevicz 2021-11-16 18:39:05 UTC 
An attacker-controlled pointer free in hush 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.

Reference:
https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/
Comment 1 Guilherme de Almeida Suckevicz 2021-11-16 18:39:19 UTC 
Created busybox tracking bugs for this issue:

Affects: fedora-all [bug 2023896]
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