What’s Vulnerable › Vulnerabilities

CVE-2020-13753

• Severity: critical (CVSS 10.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-07-14 · updated 2026-06-17
• Weakness: CWE-20

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.

Affected products

• Canonical Ubuntu Linux: 18.04, 19.10, 20.04
• Debian Linux: 10.0
• Fedoraproject Fedora: 31
• openSUSE Leap: 15.1
• Webkit: before 2.28.3 — fixed in 2.28.3
• Wpewebkit Wpe Webkit: before 2.28.3 — fixed in 2.28.3

How to fix

Upgrade to a fixed version: Webkit 2.28.3; Wpewebkit Wpe Webkit 2.28.3. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00074.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.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
• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00074.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GER2ATKZXDHM7FFYJH67ZPNZZX5VOUVM/
• https://security.gentoo.org/glsa/202007-11
• https://trac.webkit.org/changeset/262368/webkit
• https://usn.ubuntu.com/4422-1/

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