CVE-2021-28676

Description

An issue was discovered in Pillow before 8.2.0. For FLI data, FliDecode did not properly check that the block advance was non-zero, potentially leading to an infinite loop on load.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.23%
Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html#cve-2021-28676-fix-fli-dos third party advisory release notes
https://github.com/python-pillow/Pillow/pull/5377 third party advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL/ vendor advisory mailing list
https://security.gentoo.org/glsa/202107-33 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2021/07/msg00018.html third party advisory mailing list
https://github.com/python-pillow/Pillow/commit/bb6c11fb889e6c11b0ee122b828132ee763b5856 patch

Frequently Asked Questions

What is the severity of CVE-2021-28676?
CVE-2021-28676 has been scored as a high severity vulnerability.
How to fix CVE-2021-28676?
To fix CVE-2021-28676, 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-2021-28676 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-28676 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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