CVE-2021-42762
Medium
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.
SeverityMedium
CVSS5.3
Exploit probability—
Product
Webkitgtk
PublishedOct 20, 2021
First seenOct 20, 2021
How to fix
Update
- webkitgtk webkitgtk2.34.1 or later
- wpewebkit wpe_webkit2.34.1 or later
Vendor advisories
- debian.org/security/2021/dsa-4995
- debian.org/security/2021/dsa-4996
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M5J2LZQTDX53DNSKSGU7TQYCO2HKSTY4/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ON5SDVVPVPCAGFPW2GHYATZVZYLPW2L4/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H6MGXCX7P5AHWOQ6IRT477UKT7IS4DAD/
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| webkitgtk webkitgtk | v < 2.34.1 | 2.34.1 |
| wpewebkit wpe_webkit | v < 2.34.1 | 2.34.1 |
| fedoraproject fedora | 33, 34, 35 | — |
| debian debian_linux | 10.0, 11.0 | — |
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