| Name | CVE-2021-42762 |
| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-4995-1, DSA-4996-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| webkit2gtk (PTS) | jessie | 2.6.2+dfsg1-4 | vulnerable |
| stretch | 2.18.6-1~deb9u1 | vulnerable | |
| buster (security), buster, buster (lts) | 2.38.6-0+deb10u1 | fixed | |
| bullseye | 2.44.2-1~deb11u1 | fixed | |
| bullseye (security) | 2.46.4-1~deb11u1 | fixed | |
| bookworm | 2.46.0-2~deb12u1 | fixed | |
| bookworm (security) | 2.46.4-1~deb12u1 | fixed | |
| trixie | 2.46.4-1 | fixed | |
| sid | 2.46.5-1 | fixed | |
| wpewebkit (PTS) | bullseye (security), bullseye | 2.38.6-1~deb11u1 | fixed |
| bookworm | 2.38.6-1 | fixed | |
| trixie | 2.46.4-1 | fixed | |
| sid | 2.46.5-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| webkit2gtk | source | jessie | (unfixed) | end-of-life | ||
| webkit2gtk | source | buster | 2.34.1-1~deb10u1 | DSA-4995-1 | ||
| webkit2gtk | source | bullseye | 2.34.1-1~deb11u1 | DSA-4995-1 | ||
| webkit2gtk | source | (unstable) | 2.34.1-1 | |||
| wpewebkit | source | bullseye | 2.34.1-1~deb11u1 | DSA-4996-1 | ||
| wpewebkit | source | (unstable) | 2.34.1-1 |
[stretch] - webkit2gtk <ignored> (Not covered by security support in stretch)
https://bugs.webkit.org/show_bug.cgi?id=231479
https://github.com/flatpak/flatpak/security/advisories/GHSA-67h7-w3jq-vh4q