Bug 1879570 (CVE-2020-13753) - CVE-2020-13753 webkitgtk: Improper access management to CLONE_NEWUSER and the TIOCSTI ioctl
Summary: CVE-2020-13753 webkitgtk: Improper access management to CLONE_NEWUSER and the...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2020-13753
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
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Depends On:
Blocks: 1879575
TreeView+ depends on / blocked
 
Reported: 2020-09-16 14:30 UTC by Pedro Sampaio
Modified: 2021-02-16 19:15 UTC (History)
3 users (show)

Fixed In Version: webkitgtk 2.28.3
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in webkitgtk in versions prior to 2.28.3 and in WPE WebKit in versions prior to 2.28.3. The bubblewrap sandbox 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. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
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Environment:
Last Closed: 2020-09-22 20:41:35 UTC

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Description Pedro Sampaio 2020-09-16 14:30:19 UTC 
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. Versions affected: WebKitGTK before 2.28.3 and WPE WebKit before 2.28.3.
Comment 1 Pedro Sampaio 2020-09-16 14:30:24 UTC 
External References:

https://webkitgtk.org/security/WSA-2020-0006.html
Comment 2 Michael Catanzaro 2020-09-16 15:54:31 UTC 
Note that RHEL 7 and RHEL 8 are both unaffected (because WebKit is not yet sandboxed in RHEL).
Comment 3 Product Security DevOps Team 2020-09-22 20:41:35 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-13753
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