CVE-2021-32838

Regular Expression Denial of Service in flask-restx

CVSS 7.5 HIGHEPSS 1.8%CWE-400

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.5EPSS 1.8%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

20 Sep 2021Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

Flask-RESTX (pypi package flask-restx) is a community driven fork of Flask-RESTPlus. Flask-RESTX before version 0.5.1 is vulnerable to ReDoS (Regular Expression Denial of Service) in email_regex. This is fixed in version 0.5.1.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

python-restx · flask-restx

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References

https://github.com/advisories/GHSA-3q6g-vf58-7m4g https://github.com/python-restx/flask-restx/blob/fd99fe11a88531f5f3441a278f7020589f9d2cc0/flask_restx/inputs.py#L51 https://github.com/python-restx/flask-restx/commit/bab31e085f355dd73858fd3715f7ed71849656da https://github.com/python-restx/flask-restx/issues/372 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5UCTFVDU3677B5OBGK4EF5NMUPJLL6SQ/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QUD6SWZLX52AAZUHDETJ2CDMQGEPGFL3/https://pypi.org/project/flask-restx/