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Fencer Vulns
high 7.8

CVE-2017-15131 json

It was found that system umask policy is not being honored when creating XDG user directories, since Xsession sources xdg-user-dirs.sh befo…

published 2018-01-09 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-6592

cvss
7.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 25%
public exploits
0
none known

Summary

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.

Patch / fix

  • freedesktop xdg-user-dirs 0.15.5
  • xdg-user-dirs RHEL 7 0.15-5.el7

red hat advisories RHSA-2018:0842

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-15131 updated cvss 3.3

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

  • Red Hat Enterprise Linux 6 xdg-user-dirs
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Client (v. 7) xdg-user-dirs 0.15-5.el7 Red Hat Enterprise Linux ComputeNode (v. 7) xdg-user-dirs 0.15-5.el7 Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) xdg-user-dirs 0.15-5.el7 Red Hat Enterprise Linux Server (v. 7) xdg-user-dirs 0.15-5.el7 Red Hat Enterprise Linux Workstation (v. 7) xdg-user-dirs 0.15-5.el7
    fixed: vendor fix RHSA-2018:0842

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.32% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 7.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • Red Hat, Inc. RHEL shipped xdg-user-dirs and gnome-session

Classification

Weakness
  • CWE-284 Improper Access Control
  • CWE-276 Incorrect Default Permissions

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.