| Name | CVE-2021-28831 |
| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-2614-1, ELA-395-1 |
| Debian Bugs | 985674 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| busybox (PTS) | jessie, jessie (lts) | 1:1.22.0-9+deb8u5 | fixed |
| stretch (security), stretch (lts), stretch | 1:1.22.0-19+deb9u2 | fixed |
| buster | 1:1.30.1-4 | vulnerable |
| bullseye | 1:1.30.1-6 | vulnerable |
| bookworm | 1:1.35.0-4 | fixed |
| sid, trixie | 1:1.36.1-6 | fixed |
The information below is based on the following data on fixed versions.
Notes
[bullseye] - busybox <no-dsa> (Minor issue)
[buster] - busybox <no-dsa> (Minor issue)
https://git.busybox.net/busybox/commit/?id=f25d254dfd4243698c31a4f3153d4ac72aa9e9bd