CVE-2018-6560

flatpak: sandbox escape in D-Bus filtering by a crafted authentication handshake

Severity Score

8.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

En dbus-proxy/flatpak-proxy.c en Flatpak en versiones anteriores a la 0.8.9, 0.9.x y 0.10.x anteriores a la 0.10.3, se pueden utilizar mensajes D-Bus manipulados para salir del sandbox, ya que la gestión de los espacios en blanco en el proxy no es idéntica a cómo gestiona el demonio los espacios en blanco.

It was found that flatpak's D-Bus proxy did not properly filter the access to D-Bus during the authentication protocol. A specially crafted flatpak application could use this flaw to bypass all restrictions imposed by flatpak and have full access to the D-BUS interface.

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

Low

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2018-02-02 CVE Reserved
2018-02-02 CVE Published
2023-03-08 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-270: Privilege Context Switching Error
CWE-436: Interpretation Conflict

CAPEC

References (6)

URL	Tag	Source
https://github.com/flatpak/flatpak/releases/tag/0.10.3	Release Notes
https://github.com/flatpak/flatpak/releases/tag/0.8.9	Release Notes

URL	Date	SRC

URL	Date	SRC
https://github.com/flatpak/flatpak/commit/52346bf187b5a7f1c0fe9075b328b7ad6abe78f6	2019-10-03

URL	Date	SRC
https://access.redhat.com/errata/RHSA-2018:2766	2019-10-03
https://access.redhat.com/security/cve/CVE-2018-6560	2018-09-25
https://bugzilla.redhat.com/show_bug.cgi?id=1542207	2018-09-25

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Flatpak Search vendor "Flatpak"		Flatpak Search vendor "Flatpak" for product "Flatpak"				< 0.8.9 Search vendor "Flatpak" for product "Flatpak" and version " < 0.8.9"		-		Affected
Flatpak Search vendor "Flatpak"		Flatpak Search vendor "Flatpak" for product "Flatpak"				>= 0.9.1 <= 0.9.99 Search vendor "Flatpak" for product "Flatpak" and version " >= 0.9.1 <= 0.9.99"		-		Affected
Flatpak Search vendor "Flatpak"		Flatpak Search vendor "Flatpak" for product "Flatpak"				>= 0.10.0 < 0.10.3 Search vendor "Flatpak" for product "Flatpak" and version " >= 0.10.0 < 0.10.3"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Desktop Search vendor "Redhat" for product "Enterprise Linux Desktop"				7.0 Search vendor "Redhat" for product "Enterprise Linux Desktop" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server"				7.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Aus Search vendor "Redhat" for product "Enterprise Linux Server Aus"				7.6 Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "7.6"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Eus Search vendor "Redhat" for product "Enterprise Linux Server Eus"				7.5 Search vendor "Redhat" for product "Enterprise Linux Server Eus" and version "7.5"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Eus Search vendor "Redhat" for product "Enterprise Linux Server Eus"				7.6 Search vendor "Redhat" for product "Enterprise Linux Server Eus" and version "7.6"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Tus Search vendor "Redhat" for product "Enterprise Linux Server Tus"				7.6 Search vendor "Redhat" for product "Enterprise Linux Server Tus" and version "7.6"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Workstation Search vendor "Redhat" for product "Enterprise Linux Workstation"				7.0 Search vendor "Redhat" for product "Enterprise Linux Workstation" and version "7.0"		-		Affected