Denial of Service Vulnerability in Pillow by Alex Clark
CVE-2021-27923

7.5HIGH

Key Information:

Vendor

Python

Status
Pillow
Vendor
CVE Published:
3 March 2021

What is CVE-2021-27923?

Prior to version 8.1.1, Pillow, the Python Imaging Library, is susceptible to a denial of service attack due to improper validation of image sizes when handling ICO container files. Attackers can exploit this vulnerability by supplying a specially crafted ICO image, which may lead to excessive memory consumption during processing, potentially overwhelming system resources and resulting in service unavailability. It is crucial for users to upgrade to the latest version to mitigate this risk.

References

https://pillow.readthedocs.io/en/stable/releasenotes/8.1....
x_refsource_MISC
https://lists.fedoraproject.org/archives/list/package-ann...
vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/package-ann...
vendor-advisoryx_refsource_FEDORA

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.