critical
9.8
CWE
119 120
Advisory Published
Advisory Published
Updated

CVE-2021-34552: Buffer Overflow

First published: Tue Jul 13 2021(Updated: )

A flaw was found in python-pillow. This flaw allows an attacker to pass controlled parameters directly into a convert function, triggering a buffer overflow in the "convert()" or "ImagingConvertTransparent()" functions in Convert.c. The highest threat to this vulnerability is to system availability. In Red Hat Quay, a vulnerable version of python-pillow is shipped with quay-registry-container, however the invoice generation feature which uses python-pillow is disabled by default. Therefore impact has been rated Moderate.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/python-pillow<0:5.1.1-16.el8
0:5.1.1-16.el8
Python Pillow>=1.0<=1.1.7
Python Pillow>=1.2<=8.2.0
Debian Debian Linux=9.0
Fedoraproject Fedora=33
Fedoraproject Fedora=34
redhat/python-pillow<8.3.0
8.3.0
pip/pillow<8.3.0
8.3.0
>=1.0<=1.1.7
>=1.2<=8.2.0
=9.0
=33
=34

Remedy

To mitigate this flaw on Red Hat Quay, keep the invoice generation feature disabled, as it is by default. Red Hat Satellite 6.9 customers can apply following hotfix to eliminate the vulnerability warnings. * Download python2-daemon-2.1.2-7.1.HFRHBZ1998199.el7sat.noarch.rpm from https://bugzilla.redhat.com/attachment.cgi?id=1819471 * Stop services: # satellite-maintain service stop * Upgrade python2-daemon and remove affected package # rpm -Uvh python2-daemon-2.1.2-7.1.HFRHBZ1998199.el7sat.noarch.rpm # yum remove python-pillow * Restart services: # satellite-maintain service start Satellite 6.10 future release is also fixing this.

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the vulnerability ID for this flaw in python-pillow?

    The vulnerability ID for this flaw in python-pillow is CVE-2021-34552.

  • What is the severity rating of CVE-2021-34552?

    The severity rating of CVE-2021-34552 is medium with a score of 5.9.

  • Which functions in python-pillow are affected by CVE-2021-34552?

    The "convert()" and "ImagingConvertTransparent()" functions in Convert.c are affected by CVE-2021-34552.

  • What is the impacted software due to CVE-2021-34552?

    The impacted software is python-pillow versions 0:5.1.1-16.el8 and versions up to, but excluding, 8.3.0.

  • Where can I find more information about CVE-2021-34552?

    You can find more information about CVE-2021-34552 at the following references: [CVE-2021-34552](https://www.cve.org/CVERecord?id=CVE-2021-34552), [NVD](https://nvd.nist.gov/vuln/detail/CVE-2021-34552), [Pillow Release Notes](https://pillow.readthedocs.io/en/stable/releasenotes/8.3.0.html#buffer-overflow), [Bugzilla](https://bugzilla.redhat.com/show_bug.cgi?id=1982378), [Red Hat Security Advisory](https://access.redhat.com/errata/RHSA-2021:4149).

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