Pillow -- Regular Expression Denial of Service (ReDoS)

GitHub Advisory Database reports:

Uncontrolled Resource Consumption in pillow.

The package pillow from 0 and before 8.3.2 are vulnerable to Regular Expression Denial of Service (ReDoS) via the getrgb function.

References:

• https://nvd.nist.gov/vuln/detail/CVE-2021-23437
• https://github.com/python-pillow/Pillow/commit/9e08eb8f78fdfd2f476e1b20b7cf38683754866b
• https://pillow.readthedocs.io/en/stable/releasenotes/8.3.2.html
• https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1319443
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RNSG6VFXTAROGF7ACYLMAZNQV4EJ6I2C/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VKRCL7KKAKOXCVD7M6WC5OKFGL4L3SJT/

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