CVE-2020-13753
CRITICALWebKitGTK and WPE WebKit < 2.28.3 - Sandbox Escape via CLONE_NEWUSER and TIOCSTI
Title source: llmDescription
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.
References (7)
Core 7
Core References
Patch, Vendor Advisory x_refsource_misc
https://trac.webkit.org/changeset/262368/webkit
Mailing List, Third Party Advisory x_refsource_confirm
https://www.openwall.com/lists/oss-security/2020/07/10/1
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2020/dsa-4724
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GER2ATKZXDHM7FFYJH67ZPNZZX5VOUVM/
Third Party Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/4422-1/
Mailing List, Third Party Advisory vendor-advisory
x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00074.html
Third Party Advisory vendor-advisory
x_refsource_gentoo
https://security.gentoo.org/glsa/202007-11
Scores
CVSS v3
10.0
EPSS
0.0122
EPSS Percentile
79.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Details
CWE
CWE-20
Status
published
Products (8)
canonical/ubuntu_linux
18.04
canonical/ubuntu_linux
19.10
canonical/ubuntu_linux
20.04
debian/debian_linux
10.0
fedoraproject/fedora
31
opensuse/leap
15.1
webkitgtk/webkitgtk
< 2.28.3
wpewebkit/wpe_webkit
< 2.28.3
Published
Jul 14, 2020
Tracked Since
Feb 18, 2026