CVE-2021-4217

NameCVE-2021-4217
DescriptionA 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
unzip (PTS)buster6.0-23+deb10u2vulnerable
buster (security)6.0-23+deb10u3vulnerable
bullseye (security), bullseye6.0-26+deb11u1vulnerable
bookworm, sid6.0-27vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
unzipsource(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

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