1. Ubuntu Security Notices
  2. USN-5673-1

USN-5673-1: unzip vulnerabilities

Publication date

13 October 2022

Overview

Several security issues were fixed in unzip.

Releases

Packages

  • unzip - De-archiver for .zip files

Details

It was discovered that unzip did not properly handle unicode strings under
certain circumstances. If a user were tricked into opening a specially crafted
zip file, an attacker could possibly use this issue to cause unzip to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2021-4217)

It was discovered that unzip did not properly perform bounds checking while
converting wide strings to local strings. If a user were tricked into opening a
specially crafted zip file, an attacker could possibly use this issue to cause
unzip to crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2022-0529, CVE-2022-0530)

It was discovered that unzip did not properly handle unicode strings under
certain circumstances. If a user were tricked into opening a specially crafted
zip file, an attacker could possibly use this issue to cause unzip to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2021-4217)

It was discovered that unzip did not properly perform bounds checking while
converting wide strings to local strings. If a user were tricked into opening a
specially crafted zip file, an attacker could possibly use this issue to cause
unzip to crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2022-0529, CVE-2022-0530)

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
22.04 jammy unzip –  6.0-26ubuntu3.1
20.04 focal unzip –  6.0-25ubuntu1.1
18.04 bionic unzip –  6.0-21ubuntu1.2
16.04 xenial unzip –  6.0-20ubuntu1.1+esm1  
14.04 trusty unzip –  6.0-9ubuntu1.6+esm1  

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References

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