This affects the package jinja2 from 0.0.0 and before 2.11.3. The ReDoS vulnerability is mainly due to the `_punctuation_re regex` operator and its use of multiple wildcards. The last wildcard is the most exploitable as it searches for trailing punctuation. This issue can be mitigated by Markdown to format user content instead of the urlize filter, or by implementing request timeouts and limiting process memory.
CVE-2020-28493 - Medium Severity Vulnerability
A very fast and expressive template engine.
Library home page: https://files.pythonhosted.org/packages/27/24/4f35961e5c669e96f6559760042a55b9bcfcdb82b9bdb3c8753dbe042e35/Jinja2-2.11.1-py2.py3-none-any.whl
Path to dependency file: /bindings/pydeck/requirements.txt
Path to vulnerable library: /bindings/pydeck/requirements.txt,/bindings/pydeck/requirements.txt
Dependency Hierarchy: - :x: **Jinja2-2.11.1-py2.py3-none-any.whl** (Vulnerable Library)
Found in HEAD commit: 67e433f207a0fc9c0fb2b8f7a2906f254c8c4b87
Found in base branch: master
This affects the package jinja2 from 0.0.0 and before 2.11.3. The ReDoS vulnerability is mainly due to the `_punctuation_re regex` operator and its use of multiple wildcards. The last wildcard is the most exploitable as it searches for trailing punctuation. This issue can be mitigated by Markdown to format user content instead of the urlize filter, or by implementing request timeouts and limiting process memory.
Publish Date: 2021-02-01
URL: CVE-2020-28493
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: None - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: None - Integrity Impact: None - Availability Impact: Low
For more information on CVSS3 Scores, click here.Type: Upgrade version
Origin: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-28493
Release Date: 2021-02-01
Fix Resolution: Jinja2 - 2.11.3