Ubuntu 4951-1: Flatpak vulnerability | LinuxSecurity.com
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Ubuntu Security Notice USN-4951-1
May 12, 2021

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

- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

A Flatpak application could access files that it would not normally
be permitted to access.

Software Description:
- flatpak: Application deployment framework for desktop apps

Details:

Anton Lydike discovered that Flatpak did not properly handle special tokens
in desktop files. An attacker could use this to specially craft a Flatpak
application that could escape sandbox confinement.

Update instructions:

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

Ubuntu 20.10:
  flatpak                         1.8.2-1ubuntu0.2
  libflatpak0                     1.8.2-1ubuntu0.2

Ubuntu 20.04 LTS:
  flatpak                         1.6.5-0ubuntu0.3
  libflatpak0                     1.6.5-0ubuntu0.3

Ubuntu 18.04 LTS:
  flatpak                         1.0.9-0ubuntu0.3
  libflatpak0                     1.0.9-0ubuntu0.3

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

References:
  https://ubuntu.com/security/notices/USN-4951-1
  CVE-2021-21381

Package Information:
  https://launchpad.net/ubuntu/+source/flatpak/1.8.2-1ubuntu0.2
  https://launchpad.net/ubuntu/+source/flatpak/1.6.5-0ubuntu0.3
  https://launchpad.net/ubuntu/+source/flatpak/1.0.9-0ubuntu0.3

Ubuntu 4951-1: Flatpak vulnerability

May 12, 2021

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.10 - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS Summary: A Flatpak application could access files that it would not normally be permitted to access. Software Description: - flatpak: Application deployment framework for desktop apps Details: Anton Lydike discovered that Flatpak did not properly handle special tokens in desktop files. An attacker could use this to specially craft a Flatpak application that could escape sandbox confinement.

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 20.10: flatpak 1.8.2-1ubuntu0.2 libflatpak0 1.8.2-1ubuntu0.2 Ubuntu 20.04 LTS: flatpak 1.6.5-0ubuntu0.3 libflatpak0 1.6.5-0ubuntu0.3 Ubuntu 18.04 LTS: flatpak 1.0.9-0ubuntu0.3 libflatpak0 1.0.9-0ubuntu0.3 In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-4951-1

CVE-2021-21381

Severity
Ubuntu Security Notice USN-4951-1

Package Information

https://launchpad.net/ubuntu/+source/flatpak/1.8.2-1ubuntu0.2 https://launchpad.net/ubuntu/+source/flatpak/1.6.5-0ubuntu0.3 https://launchpad.net/ubuntu/+source/flatpak/1.0.9-0ubuntu0.3

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