In pygments 1.1+, fixed in 2.7.4, the lexers used to parse programming languages rely heavily on regular expressions. Some of the regular expressions have exponential or cubic worst-case complexity and are vulnerable to ReDoS. By crafting malicious input, an attacker can cause a denial of service.
CVE-2021-27291 - High Severity Vulnerability
Pygments is a syntax highlighting package written in Python.
Library home page: https://files.pythonhosted.org/packages/be/39/32da3184734730c0e4d3fa3b2b5872104668ad6dc1b5a73d8e477e5fe967/Pygments-2.5.2-py2.py3-none-any.whl
Path to dependency file: /tmp/ws-scm/Container-Security-With-JenkinsCI/requirements.txt
Path to vulnerable library: /tmp/ws-scm/Container-Security-With-JenkinsCI/requirements.txt
Dependency Hierarchy: - notebook-5.4.0-py2.py3-none-any.whl (Root Library) - ipykernel-4.10.1-py2-none-any.whl - ipython-5.10.0-py2-none-any.whl - :x: **Pygments-2.5.2-py2.py3-none-any.whl** (Vulnerable Library)
Found in HEAD commit: 42e25a9058c32f27c8cf53e7721d0dadc0b983d6
Found in base branch: master
In pygments 1.1+, fixed in 2.7.4, the lexers used to parse programming languages rely heavily on regular expressions. Some of the regular expressions have exponential or cubic worst-case complexity and are vulnerable to ReDoS. By crafting malicious input, an attacker can cause a denial of service.
Publish Date: 2021-03-17
URL: CVE-2021-27291
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: High
For more information on CVSS3 Scores, click here.Type: Upgrade version
Release Date: 2021-03-17
Fix Resolution: Pygments - 2.7.4
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