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CVE-2019-11324: Improper Certificate Validation in urllib3

April 19, 2019 (updated November 18, 2024)

The urllib3 library before 1.24.2 for Python mishandles certain cases where the desired set of CA certificates is different from the OS store of CA certificates, which results in SSL connections succeeding in situations where a verification failure is the correct outcome. This is related to use of the ssl_context, ca_certs, or ca_certs_dir argument.

References

  • access.redhat.com/errata/RHSA-2019:3335
  • access.redhat.com/errata/RHSA-2019:3590
  • github.com/advisories/GHSA-mh33-7rrq-662w
  • github.com/pypa/advisory-database/tree/main/vulns/urllib3/PYSEC-2019-133.yaml
  • github.com/urllib3/urllib3
  • github.com/urllib3/urllib3/commit/1efadf43dc63317cd9eaa3e0fdb9e05ab07254b1
  • github.com/urllib3/urllib3/compare/a6ec68a...1efadf4
  • lists.debian.org/debian-lts-announce/2021/06/msg00015.html
  • lists.debian.org/debian-lts-announce/2023/10/msg00012.html
  • lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NKGPJLVLVYCL4L4B4G5TIOTVK4BKPG72
  • lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XOSA2NT4DUQDBEIWE6O7KKD24XND7TE2
  • nvd.nist.gov/vuln/detail/CVE-2019-11324
  • pypi.org/project/urllib3/1.24.2
  • usn.ubuntu.com/3990-1

Code Behaviors & Features

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Affected versions

All versions before 1.24.2

Fixed versions

  • 1.24.2

Solution

Upgrade to version 1.24.2 or above.

Impact 7.5 HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Learn more about CVSS

Weakness

  • CWE-295: Improper Certificate Validation

Source file

pypi/urllib3/CVE-2019-11324.yml

Spotted a mistake? Edit the file on GitLab.

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