Vulnerability DatabaseCVE-2021-28831
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CVE-2021-28831
Published:March 19, 2021
Updated:May 17, 2026
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.
Related Resources (14)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7ZIFKPRR32ZYA3WAA2NXFA3QHHOU6FJ/
https://lists.debian.org/debian-lts-announce/2025/01/msg00012.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3UDQGJRECXFS5EZVDH2OI45FMO436AC4/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZASBW7QRRLY5V2R44MQ4QQM4CZIDHM2U/
https://security.netapp.com/advisory/ntap-20250509-0005/
https://lists.debian.org/debian-lts-announce/2021/04/msg00001.html
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.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZASBW7QRRLY5V2R44MQ4QQM4CZIDHM2U/
https://security.alpinelinux.org/vuln/CVE-2021-28831
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-28831
https://git.busybox.net/busybox/commit/?id=f25d254dfd4243698c31a4f3153d4ac72aa9e9bd
https://security.gentoo.org/glsa/202105-09
https://security-tracker.debian.org/tracker/CVE-2021-28831
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Complexity
LOW
Attack Vector
NETWORK
Availability
HIGH
Confidentiality
NONE
Integrity
NONE
Privileges Required
NONE
Scope
UNCHANGED
User Interaction
NONE
Weakness Type (CWE)
Improper Handling of Exceptional Conditions
CWE-755
EPSS
Base Score:
1.02