=========================================================================Ubuntu Security Notice USN-5673-1
October 13, 2022
unzip vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 ESM
- Ubuntu 14.04 ESM
Summary:
Several security issues were fixed in unzip.
Software Description:
- 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)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 22.04 LTS:
unzip 6.0-26ubuntu3.1
Ubuntu 20.04 LTS:
unzip 6.0-25ubuntu1.1
Ubuntu 18.04 LTS:
unzip 6.0-21ubuntu1.2
Ubuntu 16.04 ESM:
unzip 6.0-20ubuntu1.1+esm1
Ubuntu 14.04 ESM:
unzip 6.0-9ubuntu1.6+esm1
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-5673-1
CVE-2021-4217, CVE-2022-0529, CVE-2022-0530, https://launchpad.net/bugs/1957077
Package Information:
https://launchpad.net/ubuntu/+source/unzip/6.0-26ubuntu3.1
https://launchpad.net/ubuntu/+source/unzip/6.0-25ubuntu1.1
https://launchpad.net/ubuntu/+source/unzip/6.0-21ubuntu1.2
