[USN-7398-1] libtar vulnerabilities

[John Breton]

==========================================================================
Ubuntu Security Notice USN-7398-1
March 31, 2025

libtar vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 24.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in libtar.

Software Description:
- libtar: C library for manipulating tar archives (development files)

Details:

It was discovered that libtar may perform out-of-bounds reads when
processing specially crafted tar files. An attacker could possibly use
this issue to cause libtar to crash, resulting in a denial of service,
or execute arbitrary code. (CVE-2021-33643, CVE-2021-33644)

It was discovered that libtar contained a memory leak due to failing
to free a variable, causing performance degradation. An attacker
could possibly use this issue to cause libtar to crash, resulting in a
denial of service. (CVE-2021-33645, CVE-2021-33646)

Update instructions:

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

Ubuntu 24.10
   libtar-dev                      1.2.20-8.1ubuntu0.24.10.1
   libtar0t64                      1.2.20-8.1ubuntu0.24.10.1

Ubuntu 24.04 LTS
   libtar-dev                      1.2.20-8.1ubuntu0.24.04.1
   libtar0t64                      1.2.20-8.1ubuntu0.24.04.1

Ubuntu 22.04 LTS
   libtar-dev                      1.2.20-8ubuntu0.22.04.1
   libtar0                         1.2.20-8ubuntu0.22.04.1

Ubuntu 20.04 LTS
   libtar-dev                      1.2.20-8ubuntu0.20.04.1
   libtar0                         1.2.20-8ubuntu0.20.04.1

Ubuntu 18.04 LTS
   libtar-dev                      1.2.20-7ubuntu0.1~esm1
                                   Available with Ubuntu Pro
   libtar0                         1.2.20-7ubuntu0.1~esm1
                                   Available with Ubuntu Pro

Ubuntu 16.04 LTS
   libtar-dev                      1.2.20-4ubuntu0.1~esm1
                                   Available with Ubuntu Pro
   libtar0                         1.2.20-4ubuntu0.1~esm1
                                   Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-7398-1
   CVE-2021-33643, CVE-2021-33644, CVE-2021-33645, CVE-2021-33646

Package Information:
https://launchpad.net/ubuntu/+source/libtar/1.2.20-8.1ubuntu0.24.10.1
https://launchpad.net/ubuntu/+source/libtar/1.2.20-8.1ubuntu0.24.04.1
https://launchpad.net/ubuntu/+source/libtar/1.2.20-8ubuntu0.22.04.1
https://launchpad.net/ubuntu/+source/libtar/1.2.20-8ubuntu0.20.04.1

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