CVE-2021-28831

HIGH

Busybox < 1.32.1 - Improper Exception Handling

Title source: rule

Description

decompress_gunzip.c in BusyBox through 1.32.1 mishandles the error bit on the huft_build result pointer, with a resultant invalid free or segmentation fault, via malformed gzip data.

References (8)

[Mailing List, Patch, Vendor Advisory] https://git.busybox.net/busybox/commit/?id=f25d254dfd4243698c31a4f3153d4ac72aa9e9bd

[Mailing List, Third Party Advisory] https://lists.debian.org/debian-lts-announce/2021/04/msg00001.html

[Third Party Advisory] https://security.gentoo.org/glsa/202105-09

[Mailing List] https://lists.debian.org/debian-lts-announce/2025/01/msg00012.html

[Vendor Advisory] https://security.netapp.com/advisory/ntap-20250509-0005/

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3UDQGJRECXFS5EZVDH2OI45FMO436AC4/

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7ZIFKPRR32ZYA3WAA2NXFA3QHHOU6FJ/

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZASBW7QRRLY5V2R44MQ4QQM4CZIDHM2U/

Scores

CVSS v3 7.5

EPSS 0.0102

EPSS Percentile 77.0%

Attack Vector NETWORK

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

Classification

CWE

CWE-755

Status published

Affected Products (5)

busybox/busybox < 1.32.1

fedoraproject/fedora

debian/debian_linux

Timeline

Published Mar 19, 2021

Tracked Since Feb 18, 2026