High severity · published Jun 2, 2021
CVE-2021-28676
An issue was discovered in Pillow before 8.2.0
7.5
CVSS
2.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.5% · higher than 85% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FE
Fedora · Fedoraproject
33 · source: NVD
PI
Pillow · Python
before 8.2.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-28676
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-28676
Patch
https://github.com/python-pillow/Pillow/commit/bb6c11fb889e6c11b0ee122b828132ee763b5856
Third Party Advisory
https://github.com/python-pillow/Pillow/pull/5377
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/07/msg00018.html
Mailing List
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL/
Release Notes
https://pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html#cve-2021-28676-fix-fli-dos
Third Party Advisory
https://security.gentoo.org/glsa/202107-33
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