CVE-2021-27923 — Improper Input Validation in Pillow

CWE-20 — Improper Input ValidationCWE-400 — Uncontrolled Resource ConsumptionCWE-1284 — Improper Validation of Specified Quantity in Input10 documents8 sources
Severity
7.5HIGHNVD
EPSS
0.4%
top 38.06%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Python PillowFedoraproject FedoraPaloalto Pan-os
Timeline
PublishedMar 3
Latest updateFeb 14

Description

Pillow before 8.1.2 allows attackers to cause a denial of service (memory consumption) because the reported size of a contained image is not properly checked for an ICO container, and thus an attempted memory allocation can be very large.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages4 packages

▶NVDpython/pillow< 8.1.1
▶PyPIpython/pillow< 8.1.1+1
▶Debianpython/pillow< 8.1.2-1+3
▶Palo Altopaloalto/pan-os

Also affects: Fedora 32, 33, 34

🔴Vulnerability Details

5
GHSA
Pillow Denial of Service by Uncontrolled Resource Consumption↗2021-03-18
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OSV
Pillow Denial of Service by Uncontrolled Resource Consumption↗2021-03-18
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OSV
CVE-2021-27923: Pillow before 8↗2021-03-03
▶
OSV
CVE-2021-27923: Pillow before 8↗2021-03-03
▶
CVEList
CVE-2021-27923: Pillow before 8↗2021-03-03
▶

📋Vendor Advisories

4
Palo Alto
PAN-SA-2024-0001 Informational Bulletin: Impact of OSS CVEs in PAN-OS↗2024-02-14
▶
Ubuntu
Pillow vulnerabilities↗2021-03-11
▶
Red Hat
python-pillow: Excessive memory allocation in ICO image reader↗2021-03-03
▶
Debian
CVE-2021-27923: pillow - Pillow before 8.1.2 allows attackers to cause a denial of service (memory consum...↗2021
▶
CVE-2021-27923 — Improper Input Validation in Python | cvebase