| Name | CVE-2021-4217 |
| Description | A flaw was found in unzip. The vulnerability occurs due to improper handling of Unicode strings, which can lead to a null pointer dereference. This flaw allows an attacker to input a specially crafted zip file, leading to a crash or code execution. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| unzip (PTS) | jessie, jessie (lts) | 6.0-16+deb8u7 | vulnerable |
| stretch (lts), stretch | 6.0-21+deb9u3 | vulnerable |
| buster (security), buster, buster (lts) | 6.0-23+deb10u3 | vulnerable |
| bullseye (security), bullseye | 6.0-26+deb11u1 | vulnerable |
| sid, trixie, bookworm | 6.0-28 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| unzip | source | (unstable) | (unfixed) | unimportant | | |
Notes
https://bugzilla.redhat.com/show_bug.cgi?id=2044583
https://bugs.launchpad.net/ubuntu/+source/unzip/+bug/1957077
Crash in CLI tool, no security impact