Vulnerability CVE-2020-13753
Published: 2020-07-14

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.

Type:

CWE-20

 (Improper Input Validation)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Wpewebkit -> Wpe webkit 
Webkitgtk -> Webkitgtk 
Fedoraproject -> Fedora 

 References:
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GER2ATKZXDHM7FFYJH67ZPNZZX5VOUVM/
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
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