CVE-2021-42762 Affecting webkit2gtk package, versions <2.34.1-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.07% (32nd percentile)

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  • Snyk IDSNYK-ALPINE316-WEBKIT2GTK-2846788
  • published25 Nov 2021
  • disclosed20 Oct 2021

Introduced: 20 Oct 2021

CVE-2021-42762  (opens in a new tab)

How to fix?

Upgrade Alpine:3.16 webkit2gtk to version 2.34.1-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream webkit2gtk package and not the webkit2gtk package as distributed by Alpine. See How to fix? for Alpine:3.16 relevant fixed versions and status.

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.

CVSS Scores

version 3.1