CVE-2020-13753

critical

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.

References

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00074.html

https://lists.fedoraproject.org/archives/list/[email protected]/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

Details

Source: MITRE

Published: 2020-07-14

Updated: 2020-07-27

Type: CWE-20

Risk Information

CVSS v2

Base Score: 7.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 10

Severity: HIGH

CVSS v3

Base Score: 10

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

Impact Score: 6

Exploitability Score: 3.9

Severity: CRITICAL