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Regular expression denial-of-service in Django

Moderate severity GitHub Reviewed Published Mar 15, 2024 to the GitHub Advisory Database • Updated Jul 3, 2024

Package

pip django (pip)

Affected versions

>= 3.2, < 3.2.25
>= 4.2, < 4.2.11
>= 5.0, < 5.0.3

Patched versions

3.2.25
4.2.11
5.0.3

Description

In Django 3.2 before 3.2.25, 4.2 before 4.2.11, and 5.0 before 5.0.3, the django.utils.text.Truncator.words() method (with html=True) and the truncatewords_html template filter are subject to a potential regular expression denial-of-service attack via a crafted string. NOTE: this issue exists because of an incomplete fix for CVE-2019-14232 and CVE-2023-43665.

References

Published by the National Vulnerability Database Mar 15, 2024
Published to the GitHub Advisory Database Mar 15, 2024
Reviewed Mar 18, 2024
Last updated Jul 3, 2024

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS score

0.044%
(11th percentile)

Weaknesses

CVE ID

CVE-2024-27351

GHSA ID

GHSA-vm8q-m57g-pff3

Source code

Credits

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