Denial of service in Pillow



Published: 2021-09-03 | Updated: 2022-10-24
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-23437
CWE-ID CWE-185
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		Pillow
Universal components / Libraries / Libraries used by multiple products

Vendor Alex Clark and Contributors

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Incorrect Regular Expression

EUVDB-ID: #VU68608

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-23437

CWE-ID: CWE-185 - Incorrect Regular Expression

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient input validation when processing regular expressions. A remote attacker can pass specially crafted data to the application and perform regular expression denial of service (ReDos) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Pillow: 5.2.0 - 8.3.1

CPE2.3 External links

http://pillow.readthedocs.io/en/stable/releasenotes/8.3.2.html
http://github.com/python-pillow/Pillow/commit/9e08eb8f78fdfd2f476e1b20b7cf38683754866b
http://snyk.io/vuln/SNYK-PYTHON-PILLOW-1319443
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VKRCL7KKAKOXCVD7M6WC5OKFGL4L3SJT/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RNSG6VFXTAROGF7ACYLMAZNQV4EJ6I2C/


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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