CVE-2021-23437

Public Exploit
Regular Expression Denial of Service (ReDoS)

Description

The package pillow 5.2.0 and before 8.3.2 are vulnerable to Regular Expression Denial of Service (ReDoS) via the getrgb function.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.20%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org Vendor Advisory readthedocs.io
Affected: n/a Pillow
Published at:
Updated at:

References

Link Tags
https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1319443 patch release notes exploit third party advisory
https://pillow.readthedocs.io/en/stable/releasenotes/8.3.2.html release notes vendor advisory
https://github.com/python-pillow/Pillow/commit/9e08eb8f78fdfd2f476e1b20b7cf38683754866b third party advisory patch
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VKRCL7KKAKOXCVD7M6WC5OKFGL4L3SJT/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RNSG6VFXTAROGF7ACYLMAZNQV4EJ6I2C/ vendor advisory
https://security.gentoo.org/glsa/202211-10 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2024/03/msg00021.html mailing list

Frequently Asked Questions

What is the severity of CVE-2021-23437?
CVE-2021-23437 has been scored as a high severity vulnerability.
How to fix CVE-2021-23437?
To fix CVE-2021-23437, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-23437 being actively exploited in the wild?
It is possible that CVE-2021-23437 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-23437?
CVE-2021-23437 affects n/a Pillow.
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