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.

References

https://bugs.webkit.org/show_bug.cgi?id=231479

https://github.com/flatpak/flatpak/security/advisories/GHSA-67h7-w3jq-vh4q

http://www.openwall.com/lists/oss-security/2021/10/26/9

http://www.openwall.com/lists/oss-security/2021/10/27/1

http://www.openwall.com/lists/oss-security/2021/10/27/2

http://www.openwall.com/lists/oss-security/2021/10/27/4

https://lists.fedoraproject.org/archives/list/[email protected]/message/ON5SDVVPVPCAGFPW2GHYATZVZYLPW2L4/

https://lists.fedoraproject.org/archives/list/[email protected]/message/M5J2LZQTDX53DNSKSGU7TQYCO2HKSTY4/

https://www.debian.org/security/2021/dsa-4996

https://www.debian.org/security/2021/dsa-4995

https://lists.fedoraproject.org/archives/list/[email protected]/message/H6MGXCX7P5AHWOQ6IRT477UKT7IS4DAD/

Details

Source: MITRE

Published: 2021-10-20

Updated: 2021-11-26

Risk Information

CVSS v2

Base Score: 4.6

Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3

Base Score: 5.3

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Impact Score: 3.4

Exploitability Score: 1.8

Severity: MEDIUM