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CVE-2021-42762

Publication date 20 October 2021

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.3 · Medium

Score breakdown

BubblewrapLauncher.cpp in WebKitGTK and WPE WebKit before 2.34.1 allows a limited sandbox bypass that allows a sandboxed process to trick host processes into thinking the sandboxed process is not confined by the sandbox, by abusing VFS syscalls that manipulate its filesystem namespace. The impact is limited to host services that create UNIX sockets that WebKit mounts inside its sandbox, and the sandboxed process remains otherwise confined. NOTE: this is similar to CVE-2021-41133.

Read the notes from the security team

Status

Package Ubuntu Release Status
qtwebkit-opensource-src 24.04 LTS noble Ignored
23.10 mantic Ignored
23.04 lunar Ignored
22.10 kinetic Ignored
22.04 LTS jammy Ignored
21.10 impish Ignored
21.04 hirsute Ignored
20.04 LTS focal Ignored
18.04 LTS bionic Ignored
16.04 LTS xenial Ignored
14.04 LTS trusty Not in release
qtwebkit-source 24.04 LTS noble Not in release
23.10 mantic Not in release
23.04 lunar Not in release
22.10 kinetic Not in release
22.04 LTS jammy Not in release
21.10 impish Not in release
21.04 hirsute Not in release
20.04 LTS focal Not in release
18.04 LTS bionic Ignored
16.04 LTS xenial Ignored
14.04 LTS trusty Not in release
webkit2gtk 24.04 LTS noble
Fixed 2.34.1-1ubuntu1
23.10 mantic
Fixed 2.34.1-1ubuntu1
23.04 lunar
Fixed 2.34.1-1ubuntu1
22.10 kinetic
Fixed 2.34.1-1ubuntu1
22.04 LTS jammy
Fixed 2.34.1-1ubuntu1
21.10 impish
Fixed 2.34.1-0ubuntu0.21.10.1
21.04 hirsute
Fixed 2.34.1-0ubuntu0.21.04.1
20.04 LTS focal
Fixed 2.34.1-0ubuntu0.20.04.1
18.04 LTS bionic
Not affected
16.04 LTS xenial Ignored
14.04 LTS trusty Not in release
webkitgtk 24.04 LTS noble Not in release
23.10 mantic Not in release
23.04 lunar Not in release
22.10 kinetic Not in release
22.04 LTS jammy Not in release
21.10 impish Not in release
21.04 hirsute Not in release
20.04 LTS focal Not in release
18.04 LTS bionic Ignored
16.04 LTS xenial Ignored
14.04 LTS trusty Not in release
wpewebkit 24.04 LTS noble Not in release
23.10 mantic Not in release
23.04 lunar Not in release
22.10 kinetic Not in release
22.04 LTS jammy Ignored
21.10 impish Ignored
21.04 hirsute Ignored
20.04 LTS focal Ignored
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release

Notes

jdstrand

webkit receives limited support. For details, see https://wiki.sne.bianheman.eu.org/SecurityTeam/FAQ#webkit webkit in Ubuntu uses the JavaScriptCore (JSC) engine, not V8

mdeslaur

the bubblewrap sandbox is disabled in bionic

Severity score breakdown

Parameter Value
Base score 5.3 · Medium
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality Low
Integrity impact Low
Availability impact Low
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L