CVE-2021-28831

NameCVE-2021-28831
Descriptiondecompress_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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-2614-1
NVD severitymedium
Debian Bugs985674

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
busybox (PTS)stretch1:1.22.0-19vulnerable
stretch (security)1:1.22.0-19+deb9u2fixed
buster1:1.30.1-4vulnerable
sid, bullseye1:1.30.1-6vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
busyboxsourcestretch1:1.22.0-19+deb9u2DLA-2614-1
busyboxsource(unstable)(unfixed)985674

Notes

[bullseye] - busybox <no-dsa> (Minor issue)
[buster] - busybox <no-dsa> (Minor issue)
https://git.busybox.net/busybox/commit/?id=f25d254dfd4243698c31a4f3153d4ac72aa9e9bd

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