VulnerabilityModified
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.
HIGH 7.5EPSS 2.72%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.72%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.72% probability · 85th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-755
- Affected
- busybox/busybox · fedoraproject/fedora · debian/debian linux
- Source
- cve@mitre.org
References
- https://git.busybox.net/busybox/commit/?id=f25d254dfd4243698c31a4f3153d4ac72aa9e9bdMailing List, Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/04/msg00001.htmlMailing List, Third Party Advisory
- 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/202105-09Third Party Advisory
- https://git.busybox.net/busybox/commit/?id=f25d254dfd4243698c31a4f3153d4ac72aa9e9bdMailing List, Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/04/msg00001.htmlMailing List, Third Party Advisory
- 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/Z7ZIFKPRR32ZYA3WAA2NXFA3QHHOU6FJ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZASBW7QRRLY5V2R44MQ4QQM4CZIDHM2U/
- https://security.gentoo.org/glsa/202105-09Third Party Advisory
- https://security.netapp.com/advisory/ntap-20250509-0005/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.