PT-2021-5536 · Busybox+5 · Busybox+5

Published 2021-11-15 · Updated 2025-11-03 · CVE-2021-42374

Positive Technologies (AI Summary)

CVSS v2.0

6.1

Medium

Base vector

AV:N/AC:H/Au:N/C:P/I:N/A:C

Name of the Vulnerable Software and Affected Versions BusyBox (affected versions not specified)

Description An out-of-bounds heap read in BusyBox's unlzma applet leads to information leak and denial of service when crafted LZMA-compressed input is decompressed. This can be triggered by any applet/format that uses the vulnerable applet. The issue allows a remote attacker to cause an out-of-bounds read error and read the contents of the system memory or perform a denial-of-service attack.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

AZL-41054

AZL-6343

BDU:2021-06386

CVE-2021-42374

DLA-4019-1

OESA-2021-1441

OPENSUSE-SU-2022:0135-1

OPENSUSE-SU-2022_0135-1

OPENSUSE-SU-2022_3959-1

SUSE-SU-2022:0135-1

SUSE-SU-2022:0135-2

SUSE-SU-2022:3959-1

SUSE-SU-2022:4253-1

USN-5179-1

Affected Products

Astra Linux

Busybox

Linuxmint

Red Os

Suse

Ubuntu

References · 100

• 🔥 https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog · Exploit
• https://osv.dev/vulnerability/AZL-41054 · Vendor Advisory
• https://osv.dev/vulnerability/USN-5179-1 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2021-1441 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2022:0135-2 · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2021-42374 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQXGOGWBIYWOIVXJVRKHZR34UMEHQBXS · Vendor Advisory
• https://ubuntu.com/security/notices/USN-5179-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-42380 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-42385 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-42374 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-42374 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-42378 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-42374 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-42374 · Vendor Advisory