CVE-2021-42762

webkitgtk: limited sandbox escape via VFS syscalls

Published Oct 20, 2021 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Description
BubblewrapLauncher.cpp in WebKitGTK and WPE WebKit before 2.34.1 allows a limited sandbox bypass that allows a sandboxed process to trick host processes into thinking the sandboxed process is not confined by the sandbox, by abusing VFS syscalls that manipulate its filesystem namespace. The impact is limited to host services that create UNIX sockets that WebKit mounts inside its sandbox, and the sandboxed process remains otherwise confined. NOTE: this is similar to CVE-2021-41133.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-4995-1 webkit2gtk security update
Debian DSA Debian DSA DSA-4996-1 wpewebkit security update
EUVD EUVD EUVD-2021-29720 BubblewrapLauncher.cpp in WebKitGTK and WPE WebKit before 2.34.1 allows a limited sandbox bypass that allows a sandboxed process to trick host processes into thinking the sandboxed process is not confined by the sandbox, by abusing VFS syscalls that manipulate its filesystem namespace. The impact is limited to host services that create UNIX sockets that WebKit mounts inside its sandbox, and the sandboxed process remains otherwise confined. NOTE: this is similar to CVE-2021-41133.
Ubuntu USN Ubuntu USN USN-5127-1 WebKitGTK vulnerabilities
History
Type Values Removed Values Added
First Time appeared Redhat
Redhat rhel Els
CPEs cpe:/o:redhat:rhel_els:7
Vendors & Products Redhat
Redhat rhel Els
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Aug 4, 2024, 3:38 AM
Reserved
Oct 20, 2021, 12:00 AM
Status
Modified
Published
Oct 20, 2021, 7:15 PM
Modified
Jun 17, 2026, 4:10 AM
Severity
Moderate
Public date
Oct 20, 2021, 12:00 AM