CVE-2020-13753
CLONE_NEWUSER could potentially be used to confuse xdg-desktop-portal, which allows access outside the sandbox.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.27%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 10.0 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 3.27% probability · 88th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- webkitgtk/webkitgtk · wpewebkit/wpe webkit · fedoraproject/fedora · debian/debian linux · canonical/ubuntu linux · opensuse/leap
- Source
- cve@mitre.org
References
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00074.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GER2ATKZXDHM7FFYJH67ZPNZZX5VOUVM/
- https://security.gentoo.org/glsa/202007-11Third Party Advisory
- https://trac.webkit.org/changeset/262368/webkitPatch, Vendor Advisory
- https://usn.ubuntu.com/4422-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4724Third Party Advisory
- https://www.openwall.com/lists/oss-security/2020/07/10/1Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00074.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GER2ATKZXDHM7FFYJH67ZPNZZX5VOUVM/
- https://security.gentoo.org/glsa/202007-11Third Party Advisory
- https://trac.webkit.org/changeset/262368/webkitPatch, Vendor Advisory
- https://usn.ubuntu.com/4422-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4724Third Party Advisory
- https://www.openwall.com/lists/oss-security/2020/07/10/1Mailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.