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CVE-2021-27922

Published: 3 March 2021

Pillow before 8.1.1 allows attackers to cause a denial of service (memory consumption) because the reported size of a contained image is not properly checked for an ICNS container, and thus an attempted memory allocation can be very large.

Notes

AuthorNote
mdeslaur
while this is mentioned in the 8.1.1 release notes, it doesn't
seem to be mentioned in the CHANGES file, and I can't seem to
locate the commits that fix this in 8.1.1 vs 8.1.0
This was actually fixed in 8.1.2.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
pillow
Launchpad, Ubuntu, Debian
kinetic Not vulnerable
(8.1.2-1)
lunar Not vulnerable
(8.1.2-1)
impish Not vulnerable
(8.1.2-1)
bionic
Released (5.1.0-1ubuntu0.5)
focal
Released (7.0.0-4ubuntu0.3)
groovy
Released (7.2.0-1ubuntu0.2)
hirsute Not vulnerable
(8.1.2-1)
trusty Needs triage

upstream
Released (8.1.2)
xenial
Released (3.1.2-0ubuntu1.6)
jammy Not vulnerable
(8.1.2-1)
mantic Not vulnerable
(8.1.2-1)
Patches:
upstream: https://github.com/python-pillow/Pillow/commit/480f6819b592d7f07b9a9a52a7656c10bbe07442
pillow-python2
Launchpad, Ubuntu, Debian
kinetic Does not exist

lunar Does not exist

impish Does not exist

bionic Does not exist

focal Needs triage

groovy Ignored
(end of life)
hirsute Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

jammy Does not exist

mantic Does not exist

python-imaging
Launchpad, Ubuntu, Debian
hirsute Does not exist

kinetic Does not exist

lunar Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

impish Does not exist

bionic Does not exist

focal Does not exist

groovy Does not exist

jammy Does not exist

mantic Does not exist

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H