Vulnerability Details CVE-2021-28831
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.009
EPSS Ranking 74.3%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 5.0
References
- https://git.busybox.net/busybox/commit/?id=f25d254dfd4243698c31a4f3153d4ac72aa9e9bd
- https://lists.debian.org/debian-lts-announce/2021/04/msg00001.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/Z7ZIFKPRR32ZYA3WAA2NXFA3QHHOU6FJ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZASBW7QRRLY5V2R44MQ4QQM4CZIDHM2U/
- https://security.gentoo.org/glsa/202105-09
- https://git.busybox.net/busybox/commit/?id=f25d254dfd4243698c31a4f3153d4ac72aa9e9bd
- https://lists.debian.org/debian-lts-announce/2021/04/msg00001.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/Z7ZIFKPRR32ZYA3WAA2NXFA3QHHOU6FJ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZASBW7QRRLY5V2R44MQ4QQM4CZIDHM2U/
- https://security.gentoo.org/glsa/202105-09
- https://security.netapp.com/advisory/ntap-20250509-0005/
Products affected by CVE-2021-28831
-
cpe:2.3:a:busybox:busybox:1.32.0
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cpe:2.3:a:busybox:busybox:1.32.1
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cpe:2.3:o:debian:debian_linux:9.0
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cpe:2.3:o:fedoraproject:fedora:32
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cpe:2.3:o:fedoraproject:fedora:33
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cpe:2.3:o:fedoraproject:fedora:34