CVE-2021-28831 Information

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.

CVSS Vector

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

Reference

https://git.busybox.net/busybox/commit/?id=f25d254dfd4243698c31a4f3153d4ac72aa9e9bd https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZASBW7QRRLY5V2R44MQ4QQM4CZIDHM2U/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Z7ZIFKPRR32ZYA3WAA2NXFA3QHHOU6FJ/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3UDQGJRECXFS5EZVDH2OI45FMO436AC4/ https://lists.debian.org/debian-lts-announce/2021/04/msg00001.html https://security.gentoo.org/glsa/202105-09

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5