# libtar0 1.2.20-7ubuntu0.1~esm1: libtar0 1.2.20-7ubuntu0.1~esm1 for Ubuntu 18.04.6 LTS (bionic)

libtar0 1.2.20-7ubuntu0.1~esm1, released August 10, 2022, fixes 4 CVEs in libtar0. None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/linux/ubuntu-bionic-libtar0-1.2.20-7ubuntu0.1-esm1
- Platform: Linux
- Released: Aug 10, 2022
- Priority: High (Closes CVE-2021-33645, high severity)
- CVEs: 4, exploited: 0, on CISA KEV: 0

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [libtar0](https://patchblox.com/security/data/product/linux/libtar0.md) | Ubuntu 18.04.6 LTS (bionic) | 1.2.20-7ubuntu0.1~esm1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-33645](https://patchblox.com/security/data/cve/CVE-2021-33645.md) | High | libtar0t64: The th_read() function doesn’t free a variable t->th_buf.gnu_longlink afterallocating memory, which may cause a memor... | 7.5 | 0.0202 |  |
| [CVE-2021-33646](https://patchblox.com/security/data/cve/CVE-2021-33646.md) | High | libtar0t64: The th_read() function doesn’t free a variable t->th_buf.gnu_longname afterallocating memory, which may cause a memor... | 7.5 | 0.0200 |  |
| [CVE-2021-33643](https://patchblox.com/security/data/cve/CVE-2021-33643.md) | High | libtar0t64: An attacker who submits a crafted tar file with size in header struct being0 may be able to trigger an calling of mal... | 9.1 | 0.0188 |  |
| [CVE-2021-33644](https://patchblox.com/security/data/cve/CVE-2021-33644.md) | High | libtar0t64: An attacker who submits a crafted tar file with size in header struct being0 may be able to trigger an calling of mal... | 8.1 | 0.0158 |  |

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