CVE-2021-28677: Input Validation
First published: Thu Apr 01 2021(Updated: )
A flaw was found in python-pillow. The readline used in EPS has to deal with any combination of \r and \n as line endings. It accidentally used a quadratic method of accumulating lines while looking for a line ending. A malicious EPS file could use this to perform a denial-of-service of Pillow in the open phase, before an image was accepted for opening.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/python-pillow | <0:5.1.1-16.el8 | 0:5.1.1-16.el8 |
| Python Pillow | <8.2.0 | |
| Fedoraproject Fedora | =33 | |
| redhat/python-pillow | <8.2.0 | 8.2.0 |
| pip/Pillow | <8.2.0 | 8.2.0 |
Remedy
To mitigate this feature on Red Hat Quay keep the invoice generation feature disabled, as it is by default.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2021-28677 https://nvd.nist.gov/vuln/detail/CVE-2021-28677
- https://bugzilla.redhat.com/show_bug.cgi?id=1958257
- https://access.redhat.com/errata/RHSA-2021:4149
- https://access.redhat.com/security/cve/cve-2021-28677
- https://github.com/python-pillow/Pillow/pull/5377
- https://lists.debian.org/debian-lts-announce/2021/07/msg00018.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL/
- https://pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html#cve-2021-28677-fix-eps-dos-on-open
- https://security.gentoo.org/glsa/202107-33
- https://pillow.readthedocs.io/en/stable/releasenotes/8.2.0.html#security
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1958261
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1958259
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1958258
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1958260
- https://github.com/python-pillow/Pillow/commit/5a5e6db0abf4e7a638fb1b3408c4e495a096cb92
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL/
- https://nvd.nist.gov/vuln/detail/CVE-2021-28677
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MQHA5HAIBOYI3R6HDWCLAGFTIQP767FL
- https://github.com/advisories/GHSA-q5hq-fp76-qmrc (Advisory)
- https://github.com/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2021-93.yaml
Frequently Asked Questions
What is CVE-2021-28677?
CVE-2021-28677 is a vulnerability found in python-pillow, a library used for handling EPS data.
What is the severity of CVE-2021-28677?
CVE-2021-28677 has a severity rating of high (7).
How does CVE-2021-28677 affect python-pillow?
CVE-2021-28677 affects python-pillow versions 0:5.1.1-16.el8 up to, but excluding, 8.2.0.
How can I fix CVE-2021-28677?
To fix CVE-2021-28677, upgrade python-pillow to version 8.2.0 or higher.
Where can I find more information about CVE-2021-28677?
You can find more information about CVE-2021-28677 on CVE.org (https://www.cve.org/CVERecord?id=CVE-2021-28677) and NVD (https://nvd.nist.gov/vuln/detail/CVE-2021-28677).
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