Improper Handling of Case Sensitivity Affecting nodejs12 package, versions <12.22.7-4.22.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.09% (41st percentile)

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  • Snyk IDSNYK-SLES152-NODEJS12-2652743
  • published14 Apr 2022
  • disclosed6 Dec 2021

Introduced: 6 Dec 2021

CVE-2021-39134  (opens in a new tab)
CWE-178  (opens in a new tab)

How to fix?

Upgrade SLES:15.2 nodejs12 to version 12.22.7-4.22.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nodejs12 package and not the nodejs12 package as distributed by SLES. See How to fix? for SLES:15.2 relevant fixed versions and status.

@npmcli/arborist, the library that calculates dependency trees and manages the node_modules folder hierarchy for the npm command line interface, aims to guarantee that package dependency contracts will be met, and the extraction of package contents will always be performed into the expected folder. This is, in part, accomplished by resolving dependency specifiers defined in package.json manifests for dependencies with a specific name, and nesting folders to resolve conflicting dependencies. When multiple dependencies differ only in the case of their name, Arborist's internal data structure saw them as separate items that could coexist within the same level in the node_modules hierarchy. However, on case-insensitive file systems (such as macOS and Windows), this is not the case. Combined with a symlink dependency such as file:/some/path, this allowed an attacker to create a situation in which arbitrary contents could be written to any location on the filesystem. For example, a package pwn-a could define a dependency in their package.json file such as &#34;foo&#34;: &#34;file:/some/path&#34;. Another package, pwn-b could define a dependency such as FOO: &#34;file:foo.tgz&#34;. On case-insensitive file systems, if pwn-a was installed, and then pwn-b was installed afterwards, the contents of foo.tgz would be written to /some/path, and any existing contents of /some/path would be removed. Anyone using npm v7.20.6 or earlier on a case-insensitive filesystem is potentially affected. This is patched in @npmcli/arborist 2.8.2 which is included in npm v7.20.7 and above.

CVSS Scores

version 3.1