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CVE-2020-13753

Published: 13 July 2020

The bubblewrap sandbox of WebKitGTK and WPE WebKit, prior to 2.28.3, failed to properly block access to CLONE_NEWUSER and the TIOCSTI ioctl. CLONE_NEWUSER could potentially be used to confuse xdg-desktop-portal, which allows access outside the sandbox. TIOCSTI can be used to directly execute commands outside the sandbox by writing to the controlling terminal's input buffer, similar to CVE-2017-5226.

Notes

AuthorNote
jdstrand
webkit receives limited support. For details, see
https://wiki.ubuntu.com/SecurityTeam/FAQ#webkit
webkit in Ubuntu uses the JavaScriptCore (JSC) engine, not V8

Priority

Medium

Cvss 3 Severity Score

10.0

Score breakdown

Status

Package Release Status
qtwebkit
Launchpad, Ubuntu, Debian
bionic Does not exist

eoan Ignored
(end of life)
focal Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

hirsute Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

groovy Does not exist

upstream Needs triage

mantic Does not exist

qtwebkit-opensource-src
Launchpad, Ubuntu, Debian
bionic Needs triage

eoan Ignored
(end of life)
focal Needs triage

hirsute Ignored
(end of life)
groovy Ignored
(end of life)
kinetic Ignored
(end of life, was needs-triage)
jammy Needs triage

impish Ignored
(end of life)
lunar Ignored
(end of life, was needs-triage)
trusty Does not exist

upstream Needs triage

xenial Needs triage

mantic Needs triage

qtwebkit-source
Launchpad, Ubuntu, Debian
impish Does not exist

hirsute Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

bionic Needs triage

eoan Does not exist

focal Does not exist

groovy Does not exist

trusty Does not exist

upstream Needs triage

xenial Needs triage

mantic Does not exist

webkit2gtk
Launchpad, Ubuntu, Debian
impish Not vulnerable
(2.28.3-2)
hirsute Not vulnerable
(2.28.3-2)
groovy Not vulnerable
(2.28.3-2)
jammy Not vulnerable
(2.28.3-2)
kinetic Not vulnerable
(2.28.3-2)
lunar Not vulnerable
(2.28.3-2)
bionic
Released (2.28.3-0ubuntu0.18.04.1)
eoan
Released (2.28.3-0ubuntu0.19.10.1)
focal
Released (2.28.3-0ubuntu0.20.04.1)
trusty Does not exist

upstream Needs triage

xenial Deferred

mantic Not vulnerable
(2.28.3-2)
webkitgtk
Launchpad, Ubuntu, Debian
impish Does not exist

hirsute Does not exist

groovy Does not exist

xenial Needs triage

jammy Does not exist

kinetic Does not exist

lunar Does not exist

bionic Needs triage

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream Needs triage

mantic Does not exist

Severity score breakdown

Parameter Value
Base score 10.0
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Changed
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H