CVE-2023-42365

2023-11-2700:00:00

ubuntu.com

busybox

vulnerability

use-after-free

awk pattern

copyvar function

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

AI Score

5.6

Confidence

High

EPSS

Percentile

12.7%

JSON

A use-after-free vulnerability was discovered in BusyBox v.1.36.1 via a
crafted awk pattern in the awk.c copyvar function.

Bugs

<https://bugs.busybox.net/show_bug.cgi?id=15871>
<https://bugs.busybox.net/show_bug.cgi?id=15868 (bug for CVE-2023-42364)>

Notes

Author	Note
eslerm	CVE-2023-42364 and CVE-2023-42365 share a patch, see both bugs upstream’s patch contains a regression alpine has a patch for the regression upstream introduced

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchbusybox< anyUNKNOWN
ubuntu20.04noarchbusybox< anyUNKNOWN
ubuntu22.04noarchbusybox< anyUNKNOWN
ubuntu24.04noarchbusybox< anyUNKNOWN
ubuntu14.04noarchbusybox< anyUNKNOWN
ubuntu16.04noarchbusybox< anyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	busybox	< any	UNKNOWN
ubuntu	20.04	noarch	busybox	< any	UNKNOWN
ubuntu	22.04	noarch	busybox	< any	UNKNOWN
ubuntu	24.04	noarch	busybox	< any	UNKNOWN
ubuntu	14.04	noarch	busybox	< any	UNKNOWN
ubuntu	16.04	noarch	busybox	< any	UNKNOWN