CVE-2021-28831
busybox - security update
7.5
HIGH
CVSS 3.1
EPSS 1.0%
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.
How to fix CVE-2021-28831
To remediate CVE-2021-28831, upgrade the affected package to a fixed version below.
- Alpine/busybox—upgrade to 1.30.1-r5 or later
- Debian/busybox—upgrade to 1:1.30.1-6+deb11u1 or later
- —upgrade to 1:1.22.0-19+deb9u2 or later
- —upgrade to 1:1.30.1-6+deb11u1 or later
Is CVE-2021-28831 being exploited?
Low — EPSS is 1.0%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 1.30.1-r5
- from 0, < 1:1.30.1-6+deb11u1
- from 0, < 1:1.22.0-19+deb9u2
- from 0, < 1:1.30.1-6+deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |