CVE-2021-25292: Input Validation
First published: Sun Feb 28 2021(Updated: )
An issue was discovered in Pillow before 8.1.1. The PDF parser allows a regular expression DoS (ReDoS) attack via a crafted PDF file because of a catastrophic backtracking regex.
Credit: cve@mitre.org cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Python Pillow | <8.1.1 | |
| redhat/python-pillow | <0:5.1.1-16.el8 | 0:5.1.1-16.el8 |
| redhat/python-pillow | <8.1.1 | 8.1.1 |
| pip/Pillow | >=5.1.0<8.1.1 | 8.1.1 |
Remedy
Disable the invoice generation feature to mitigate this vulnerability in Red Hat Quay.
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Reference Links
- https://pillow.readthedocs.io/en/stable/releasenotes/8.1.1.html
- https://security.gentoo.org/glsa/202107-33
- https://www.cve.org/CVERecord?id=CVE-2021-25292 https://nvd.nist.gov/vuln/detail/CVE-2021-25292
- https://bugzilla.redhat.com/show_bug.cgi?id=1934699
- https://access.redhat.com/errata/RHSA-2021:4149
- https://access.redhat.com/errata/RHSA-2021:3917
- https://access.redhat.com/security/cve/cve-2021-25292
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1934702
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1934700
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1934701
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1934703
- https://github.com/python-pillow/Pillow/commit/3bce145966374dd39ce58a6fc0083f8d1890719c
- https://github.com/python-pillow/Pillow/pull/5393/files
- https://nvd.nist.gov/vuln/detail/CVE-2021-25292
- https://github.com/python-pillow/Pillow/commit/6207b44ab1ff4a91d8ddc7579619876d0bb191a4
- https://github.com/python-pillow/Pillow/commit/521dab94c7ab72b037bd9a83e9663401e0fd2cee
- https://github.com/advisories/GHSA-9hx2-hgq2-2g4f (Advisory)
Frequently Asked Questions
What is the vulnerability ID for this flaw?
The vulnerability ID is CVE-2021-25292.
What is the severity level of CVE-2021-25292?
The severity level of CVE-2021-25292 is high (7).
Which software version is affected by this vulnerability?
The affected software versions are Python Pillow versions up to (but not including) 8.1.1.
How can I fix CVE-2021-25292?
You can fix CVE-2021-25292 by updating to Python Pillow version 8.1.1 or later.
What is a regular expression DoS (ReDoS) attack?
A regular expression denial of service (ReDoS) attack is a type of input validation vulnerability that can cause the application to become unresponsive or consume excessive resources when processing certain maliciously crafted input.
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