CVE-2021-42762

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

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

Tenable Plugins

View all (7 total)

IDNameProductFamilySeverity
155703SUSE SLES15 Security Update : webkit2gtk3 (SUSE-SU-2021:3769-1)NessusSuSE Local Security Checks
high
155699SUSE SLED12 / SLES12 Security Update : webkit2gtk3 (SUSE-SU-2021:3768-1)NessusSuSE Local Security Checks
medium
154952openSUSE 15 Security Update : webkit2gtk3 (openSUSE-SU-2021:1454-1)NessusSuSE Local Security Checks
medium
154906SUSE SLED15 / SLES15 Security Update : webkit2gtk3 (SUSE-SU-2021:3603-1)NessusSuSE Local Security Checks
medium
154889openSUSE 15 Security Update : webkit2gtk3 (openSUSE-SU-2021:3603-1)NessusSuSE Local Security Checks
medium
154734Debian DSA-4996-1 : wpewebkit - security updateNessusDebian Local Security Checks
high
154732Debian DSA-4995-1 : webkit2gtk - security updateNessusDebian Local Security Checks
high