medium
5.3
CWE
20
Advisory Published
Updated

CVE-2023-27043: Input Validation

First published: Tue Apr 18 2023(Updated: )

Python could allow a remote attacker to bypass security restrictions, caused by a parsing flaw in the email.utils.parsaddr() and email.utils.getaddresses() functions. By sending a specially-crafted e-mail addresses with a special character, an attacker could exploit this vulnerability to send messages from e-mail addresses that would otherwise be rejected.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Python Python<=2.7.18
Python Python>=3.0<=3.11
IBM Cognos Dashboards on Cloud Pak for Data<=4.7.0
<=2.7.18
>=3.0<=3.11

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Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2023-27043?

    CVE-2023-27043 is a vulnerability in the Python email module that allows a remote attacker to bypass security restrictions due to a parsing flaw in email addresses.

  • What is the severity of CVE-2023-27043?

    The severity of CVE-2023-27043 is medium, with a CVSS severity score of 5.3.

  • Which software versions are affected by CVE-2023-27043?

    Python versions up to and including 2.7.18 and Python versions between 3.0 and 3.11.3 are affected by CVE-2023-27043.

  • How can an attacker exploit CVE-2023-27043?

    An attacker can exploit CVE-2023-27043 by manipulating email addresses containing special characters to bypass security mechanisms and gain unauthorized access.

  • Is there a fix available for CVE-2023-27043?

    Yes, upgrading to a fixed version of Python (2.7.19 or 3.11.4) or applying the necessary patches provided by the vendor can resolve the CVE-2023-27043 vulnerability.

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