Access Restriction Bypass Affecting torvalds/linux package, versions [,3.19.1)


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Proof of Concept
EPSS
89.56% (100th percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3006230
  • published26 Jan 2022
  • disclosed28 Nov 2016
  • creditUnknown

Introduced: 28 Nov 2016

CVE-2015-1328  (opens in a new tab)
CWE-264  (opens in a new tab)

How to fix?

Upgrade torvalds/linux to version 3.19.1 or higher.

Overview

Affected versions of this package are vulnerable to Access Restriction Bypass. The overlayfs implementation in the linux (aka Linux kernel) package before 3.19.0-21.21 in Ubuntu through 15.04 does not properly check permissions for file creation in the upper filesystem directory, which allows local users to obtain root access by leveraging a configuration in which overlayfs is permitted in an arbitrary mount namespace.

CVSS Base Scores

version 3.1