CVE-2020-13753 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Reference

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00074.html https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GER2ATKZXDHM7FFYJH67ZPNZZX5VOUVM/ https://security.gentoo.org/glsa/202007-11 https://trac.webkit.org/changeset/262368/webkit https://usn.ubuntu.com/4422-1/ https://www.debian.org/security/2020/dsa-4724 https://www.openwall.com/lists/oss-security/2020/07/10/1

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

10.0