---
title: 'USN-5352-1: Libtasn1 vulnerability | Ubuntu security notices'
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/notices/USN-5352-1
---

1. [Ubuntu Security Notices](https://ubuntu.com/security/notices)
2. USN-5352-1

---

# USN-5352-1: Libtasn1 vulnerability

Publication date

28 March 2022

Overview

Libtasn1 could be made to crash if it opened a specially crafted
file.

Releases

[16.04 LTS](https://ubuntu.com/security/notices?release=xenial)

---

Open side navigation

## Packages

* [libtasn1-6](https://ubuntu.com/security/cves?package=libtasn1-6) - Library to manage ASN.1 structures

## Details

It was discovered that Libtasn1 incorrectly handled certain files.
An attacker could possibly use this issue to cause a denial of service.

## Update instructions

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

[Learn more about how to get the fixes.](https://ubuntu.com/security/cves/about#security)

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

| Ubuntu Release | Package Version |
| --- | --- |
| 16.04 LTS xenial | [libtasn1-bin](https://launchpad.net/ubuntu/+source/libtasn1-6) –  4.7-3ubuntu0.16.04.3+esm2   Ubuntu Pro | | |
| [libtasn1-6](https://launchpad.net/ubuntu/+source/libtasn1-6) –  4.7-3ubuntu0.16.04.3+esm2   Ubuntu Pro | | |

---

### Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

[Get Ubuntu Pro](https://ubuntu.com/pro)

## References

* [CVE-2018-1000654](https://ubuntu.com/security/CVE-2018-1000654)