Prototype Pollution in async

[TheKingTermux]

Description

A vulnerability exists in Async through 3.2.1 for 3.x and through 2.6.3 for 2.x (fixed in 3.2.2 and 2.6.4), which could let a malicious user obtain privileges via the mapValues() method.

Severity Check

• Low
• Moderate
• High
• Critical

Severity Number

7,8 / 10

CVSS base metrics

• Attack vector
  Local

• Attack complexity
  Low

• Privileges required
  None

• User interaction
  Required

• Scope
  Unchanged

• Confidentiality
  High

• Integrity
  High

• Availability
  High

• CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

• Weaknesses
  CWE-1321

• CVE ID
  CVE-2021-43138

• GHSA ID
  GHSA-fwr7-v2mv-hh25

• Source code
  caolan/async

Information

• Package
  async (npm)

• Affected versions

= 3.0.0, < 3.2.2
= 2.0.0, < 2.6.4

• Patched versions
  3.2.2
  2.6.4

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-43138

• caolan/async@e1ecdbf

• https://github.com/caolan/async/blob/master/lib/internal/iterator.js

• https://github.com/caolan/async/blob/master/lib/mapValuesLimit.js

• https://jsfiddle.net/oz5twjd9/
  Fix prototype pollution vulnerability caolan/async#1828

• caolan/async@8f7f903

• https://github.com/caolan/async/blob/v2.6.4/CHANGELOG.md#v264

• caolan/async@v2.6.3...v2.6.4

• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MTEUUTNIEBHGKUKKLNUZSV7IEP6IP3Q3/

• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UM6XJ73Q3NAM5KSGCOKJ2ZIA6GUWUJLK/