Time of Check Time of Use (TOCTOU) Affecting netblue30/firejail package, versions [,0.9.64.4)


Severity

Recommended
0.0
high
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.44% (36th percentile)

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  • Snyk IDSNYK-UNMANAGED-NETBLUE30FIREJAIL-2369385
  • published26 Jan 2022
  • disclosed8 Feb 2021
  • creditUnknown

Introduced: 8 Feb 2021

CVE-2021-26910  (opens in a new tab)
CWE-367  (opens in a new tab)

How to fix?

Upgrade netblue30/firejail to version 0.9.64.4 or higher.

Overview

Affected versions of this package are vulnerable to Time of Check Time of Use (TOCTOU). Firejail before 0.9.64.4 allows attackers to bypass intended access restrictions because there is a TOCTOU race condition between a stat operation and an OverlayFS mount operation.

CVSS Base Scores

version 3.1