// For flags

CVE-2017-15131

gnome-session: Xsession creation of XDG user directories does not honor system umask policy

Severity Score

7.8
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

It was found that system umask policy is not being honored when creating XDG user directories, since Xsession sources xdg-user-dirs.sh before setting umask policy. This only affects xdg-user-dirs before 0.15.5 as shipped with Red Hat Enterprise Linux.

Se ha descubierto que no se respeta la política system umask cuando se crean directorios de usuarios XDG, ya que Xsession obtiene xdg-user-dirs.sh antes de establecer la política umask. Esto solo afecta a xdg-user-dirs en versiones anteriores a la 0.15.5, tal y como se incluye en Red Hat Enterprise Linux.

It was found that the system umask policy is not being honored when creating XDG user directories (~/Desktop etc) on first login. This could lead to user's files being inadvertently exposed to other local users.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
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
  • 2017-10-08 CVE Reserved
  • 2018-01-09 CVE Published
  • 2023-03-08 EPSS Updated
  • 2024-08-05 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-266: Incorrect Privilege Assignment
  • CWE-276: Incorrect Default Permissions
  • CWE-284: Improper Access Control
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Freedesktop
Search vendor "Freedesktop"
 Xdg-user-dirs
Search vendor "Freedesktop" for product "Xdg-user-dirs"
 < 0.15.5
Search vendor "Freedesktop" for product "Xdg-user-dirs" and version " < 0.15.5"
-
Affected
Redhat
Search vendor "Redhat"
 Enterprise Linux
Search vendor "Redhat" for product "Enterprise Linux"
 7.0
Search vendor "Redhat" for product "Enterprise Linux" and version "7.0"
-
Affected