Vulnerability 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 Score
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Busybox | Busybox | >= 1.32.0, <= 1.32.1 |
| Fedoraproject | Fedora | 32 |
| Debian | Debian Linux | 9.0 |
Related Weaknesses (CWE)
References
- https://git.busybox.net/busybox/commit/?id=f25d254dfd4243698c31a4f3153d4ac72aa9eMailing ListPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/04/msg00001.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202105-09Third Party Advisory
- https://git.busybox.net/busybox/commit/?id=f25d254dfd4243698c31a4f3153d4ac72aa9eMailing ListPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/04/msg00001.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/01/msg00012.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202105-09Third Party Advisory
- https://security.netapp.com/advisory/ntap-20250509-0005/
FAQ
What is CVE-2021-28831?
CVE-2021-28831 is a vulnerability with a CVSS score of 7.5 (HIGH). 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.
How severe is CVE-2021-28831?
CVE-2021-28831 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-28831?
Check the references section above for vendor advisories and patch information. Affected products include: Busybox Busybox, Fedoraproject Fedora, Debian Debian Linux.