CVE-2021-23437: Regular Expression Denial of Service (ReDoS)
First published: Fri Sep 03 2021(Updated: )
The package pillow 5.2.0 and before 8.3.2 are vulnerable to Regular Expression Denial of Service (ReDoS) via the getrgb function.
Credit: report@snyk.io report@snyk.io report@snyk.io
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Python Pillow | >=5.2.0<8.3.2 | |
| Fedoraproject Fedora | =33 | |
| Fedoraproject Fedora | =34 | |
| pip/pillow | >=5.2.0<8.3.2 | 8.3.2 |
| fedoraproject fedora | =33 | |
| fedoraproject fedora | =34 | |
| Fedora | =33 | |
| Fedora | =34 |
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Reference Links
- https://github.com/python-pillow/Pillow/commit/9e08eb8f78fdfd2f476e1b20b7cf38683754866b
- 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/
- https://pillow.readthedocs.io/en/stable/releasenotes/8.3.2.html
- https://security.gentoo.org/glsa/202211-10
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1319443
- https://lists.debian.org/debian-lts-announce/2024/03/msg00021.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RNSG6VFXTAROGF7ACYLMAZNQV4EJ6I2C/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VKRCL7KKAKOXCVD7M6WC5OKFGL4L3SJT/
- https://nvd.nist.gov/vuln/detail/CVE-2021-23437
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RNSG6VFXTAROGF7ACYLMAZNQV4EJ6I2C
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VKRCL7KKAKOXCVD7M6WC5OKFGL4L3SJT
- 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
- https://github.com/advisories/GHSA-98vv-pw6r-q6q4 (Advisory)
- https://github.com/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2021-317.yaml
Frequently Asked Questions
What is vulnerability CVE-2021-23437?
Vulnerability CVE-2021-23437 is a Regular Expression Denial of Service (ReDoS) vulnerability in the package pillow version 5.2.0 and before 8.3.2.
How does the vulnerability CVE-2021-23437 impact the affected software?
The vulnerability CVE-2021-23437 allows an attacker to perform a Regular Expression Denial of Service (ReDoS) attack via the getrgb function in the pillow package.
What is the severity level of vulnerability CVE-2021-23437?
The severity level of vulnerability CVE-2021-23437 is high, with a severity value of 7.5.
How can I fix vulnerability CVE-2021-23437?
To fix vulnerability CVE-2021-23437, update the pillow package to version 8.3.2 or above.
Where can I find more information about vulnerability CVE-2021-23437?
You can find more information about vulnerability CVE-2021-23437 at the following references: [NVD](https://nvd.nist.gov/vuln/detail/CVE-2021-23437), [GitHub](https://github.com/python-pillow/Pillow/commit/9e08eb8f78fdfd2f476e1b20b7cf38683754866b), [Pillow Release Notes](https://pillow.readthedocs.io/en/stable/releasenotes/8.3.2.html).
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