USN-5673-1: unzip vulnerabilities

Releases

• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

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)

Update instructions

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

Ubuntu 22.04

• unzip - 6.0-26ubuntu3.1

Ubuntu 20.04

• unzip - 6.0-25ubuntu1.1

Ubuntu 18.04

• unzip - 6.0-21ubuntu1.2

Ubuntu 16.04

• unzip - 6.0-20ubuntu1.1+esm1
  Available with Ubuntu Pro

Ubuntu 14.04

• unzip - 6.0-9ubuntu1.6+esm1
  Available with Ubuntu Pro

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

References

• CVE-2022-0529
• CVE-2021-4217
• CVE-2022-0530
• https://launchpad.net/bugs/1957077