USN-7398-1: libtar vulnerabilities

Releases

• Ubuntu 24.10
• Ubuntu 24.04 LTS
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• 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

• libtar-dev - 1.2.20-8.1ubuntu0.24.04.1
• libtar0t64 - 1.2.20-8.1ubuntu0.24.04.1

Ubuntu 22.04

• libtar-dev - 1.2.20-8ubuntu0.22.04.1
• libtar0 - 1.2.20-8ubuntu0.22.04.1

Ubuntu 20.04

• libtar-dev - 1.2.20-8ubuntu0.20.04.1
• libtar0 - 1.2.20-8ubuntu0.20.04.1

Ubuntu 18.04

• 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

• 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

• CVE-2021-33644
• CVE-2021-33646
• CVE-2021-33645
• CVE-2021-33643