Flatpak up to 0.8.8/0.9.x/0.10.2 D-Bus Message flatpak-proxy.c Whitespace data processing

Summaryinfo

A vulnerability categorized as critical has been discovered in Flatpak up to 0.8.8/0.9.x/0.10.2. The affected element is an unknown function of the file dbus-proxy/flatpak-proxy.c of the component D-Bus Message Handler. Such manipulation as part of Whitespace leads to data processing. This vulnerability is listed as CVE-2018-6560. The attack must be carried out locally. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Flatpak up to 0.8.8/0.9.x/0.10.2. It has been rated as critical. Affected by this issue is an unknown functionality of the file dbus-proxy/flatpak-proxy.c of the component D-Bus Message Handler. The manipulation as part of a Whitespace leads to a data processing vulnerability. Using CWE to declare the problem leads to CWE-19. Impacted is confidentiality, integrity, and availability. CVE summarizes:

In dbus-proxy/flatpak-proxy.c in Flatpak before 0.8.9, and 0.9.x and 0.10.x before 0.10.3, crafted D-Bus messages to the host can be used to break out of the sandbox, because whitespace handling in the proxy is not identical to whitespace handling in the daemon.

The bug was discovered 01/29/2018. The weakness was presented 02/02/2018 (GitHub Repository). The advisory is available at github.com. This vulnerability is handled as CVE-2018-6560 since 02/02/2018. The exploitation is known to be easy. Local access is required to approach this attack. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 4 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 106663 (openSUSE Security Update : flatpak (openSUSE-2018-139)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 170845 (OpenSUSE Security Update for flatpak (openSUSE-SU-2018:0389-1)).

Upgrading to version 0.8.9 or 0.10.3 eliminates this vulnerability. A possible mitigation has been published 5 days after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (106663). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

• Flatpak

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.8.0
• 0.8.1
• 0.8.2
• 0.8.3
• 0.8.4
• 0.8.5
• 0.8.6
• 0.8.7
• 0.8.8
• 0.9
• 0.10.0
• 0.10.1
• 0.10.2

License

• open-source

Website

• Product: https://github.com/flatpak/flatpak/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion