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Fencer Intel
medium 6.5

CVE-2018-11713 json

WebCore/platform/network/soup/SocketStreamHandleImplSoup.cpp in the libsoup network backend of WebKit, as used in WebKitGTK+ prior to versi…

published 2018-06-04 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-3732

cvss
6.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.6%
EPSS 1.6% chance of exploitation in 30 days, percentile 75%
public exploits
0
none known

Summary

WebCore/platform/network/soup/SocketStreamHandleImplSoup.cpp in the libsoup network backend of WebKit, as used in WebKitGTK+ prior to version 2.20.0 or without libsoup 2.62.0, unexpectedly failed to use system proxy settings for WebSocket connections. As a result, users could be deanonymized by crafted web sites via a WebSocket connection.

Patch / fix

  • webkitgtk webkitgtk+ 2.20.0
  • gnome libsoup 2.62.0
  • webkit2gtk Debian 14, Debian 13, Debian 12 2.20.0-2

debian advisories DEBIAN-CVE-2018-11713

  • atk RHEL 7 2.28.1-1.el7
  • eog RHEL 7 3.28.3-1.el7
  • gcr RHEL 7 3.28.0-1.el7
  • gdm RHEL 7 1:3.28.2-9.el7
  • gjs RHEL 7 1.52.3-1.el7
  • gom RHEL 7 0.3.3-1.el7
  • bolt RHEL 7 0.4-3.el7
  • gtk3 RHEL 7 3.22.30-3.el7

red hat advisories RHSA-2018:3140

  • webkit2gtk3 SLE Module for Desktop Applications 15, SLE Module for Basesystem 15 2.22.5-3.13.1
  • webkit2gtk3 SLES for SAP 12 SP3, SLES 12 SP3, SLED 12 SP3 +2 more 2.20.3-2.23.8

suse advisories SUSE-SU-2019:0092-1SUSE-SU-2018:3387-1

  • webkit2gtk3 openSUSE Leap 15.0 2.22.5-lp150.2.9.1

opensuse advisories openSUSE-SU-2019:0081-1

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-2018-11713 updated cvss 5.3

webkitgtk: WebSockets don't use system proxy settings

  • Red Hat Enterprise Linux 6 webkitgtk Red Hat Enterprise Linux 7 webkitgtk3, libwebkit2gtk
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Client (v. 7) bolt 0.4-3.el7, gom 0.3.3-1.el7, atk 2.28.1-1.el7, eog 3.28.3-1.el7, gcr 3.28.0-1.el7, gdm 3.28.2-9.el7, +225 more Red Hat Enterprise Linux Client Optional (v. 7) eog 3.28.3-1.el7, vala 0.40.8-1.el7, gedit 3.28.1-1.el7, glade 3.22.1-1.el7, devhelp 3.28.1-1.el7, valadoc 0.40.8-1.el7, +73 more Red Hat Enterprise Linux ComputeNode (v. 7) atk 2.28.1-1.el7, gcr 3.28.0-1.el7, rest 0.8.1-2.el7, fwupd 1.0.8-4.el7, fwupdate 12-5.el7, gssdp 1.0.2-1.el7, +64 more Red Hat Enterprise Linux ComputeNode Optional (v. 7) bolt 0.4-3.el7, gdm 3.28.2-9.el7, gjs 1.52.3-1.el7, grilo 0.3.6-1.el7, gvfs 1.36.2-1.el7, vala 0.40.8-1.el7, +93 more Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) bolt 0.4-3.el7, gom 0.3.3-1.el7, atk 2.28.1-1.el7, eog 3.28.3-1.el7, gcr 3.28.0-1.el7, gdm 3.28.2-9.el7, +213 more Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) eog 3.28.3-1.el7, ekiga 4.0.1-8.el7, vala 0.40.8-1.el7, gedit 3.28.1-1.el7, glade 3.22.1-1.el7, devhelp 3.28.1-1.el7, +87 more
    +4 more products
    Red Hat Enterprise Linux Server (v. 7) bolt 0.4-3.el7, gom 0.3.3-1.el7, atk 2.28.1-1.el7, eog 3.28.3-1.el7, gcr 3.28.0-1.el7, gdm 3.28.2-9.el7, +214 more Red Hat Enterprise Linux Server Optional (v. 7) eog 3.28.3-1.el7, ekiga 4.0.1-8.el7, vala 0.40.8-1.el7, gedit 3.28.1-1.el7, glade 3.22.1-1.el7, devhelp 3.28.1-1.el7, +86 more Red Hat Enterprise Linux Workstation (v. 7) bolt 0.4-3.el7, gom 0.3.3-1.el7, atk 2.28.1-1.el7, eog 3.28.3-1.el7, gcr 3.28.0-1.el7, gdm 3.28.2-9.el7, +226 more Red Hat Enterprise Linux Workstation Optional (v. 7) eog 3.28.3-1.el7, vala 0.40.8-1.el7, gedit 3.28.1-1.el7, glade 3.22.1-1.el7, devhelp 3.28.1-1.el7, valadoc 0.40.8-1.el7, +72 more
    fixed: vendor fix RHSA-2018:3140
  • Red Hat Enterprise Linux 8 webkit2gtk3, webkit2gtk3-jsc, webkit2gtk3-plugin-process-gtk2
    not affected: vulnerable code not present

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

1.55% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 6.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

References

Sources

Fencer Intel 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.