Bug 2023938 (CVE-2021-42386) - CVE-2021-42386 busybox: use-after-free in awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the nvalloc()
Summary: CVE-2021-42386 busybox: use-after-free in awk applet leads to denial of servi...
Keywords:
Status: NEW
Alias: CVE-2021-42386
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: 2023939
Blocks: 2023944
TreeView+ depends on / blocked
 
Reported: 2021-11-16 19:32 UTC by Guilherme de Almeida Suckevicz
Modified: 2023-07-07 08:35 UTC (History)
6 users (show)

Fixed In Version: BusyBox 1.34.0
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Doc Text:
A flaw was found in BusyBox, where it did not properly sanitize while processing a crafted awk pattern in the nvalloc function, leading to 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 19:32:48 UTC 
A use-after-free in awk leads to denial of service and possibly code execution when processing a crafted awk pattern in the nvalloc function.

Reference:
https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/
Comment 1 Guilherme de Almeida Suckevicz 2021-11-16 19:33:02 UTC 
Created busybox tracking bugs for this issue:

Affects: fedora-all [bug 2023939]
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