Description
In PHP versions 7.2.x below 7.2.28, 7.3.x below 7.3.15 and 7.4.x below 7.4.3, when using file upload functionality, if upload progress tracking is enabled, but session.upload_progress.cleanup is set to 0 (disabled), and the file upload fails, the upload procedure would try to clean up data that does not exist and encounter null pointer dereference, which would likely lead to a crash.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected products
- PHP Group / PHP7.3.x – 7.3.15
- PHP Group / PHP7.4.x – 7.4.3
- PHP Group / PHP7.2.x – 7.2.28
References
- MISChttps://bugs.php.net/bug.php?id=79221
- MAILING_LISThttp://lists.opensuse.org/opensuse-security-announce/2020-03/msg00023.html
- MISChttps://security.gentoo.org/glsa/202003-57
- MAILING_LISThttps://lists.debian.org/debian-lts-announce/2020/03/msg00034.html
- VENDOR_ADVISORYhttps://usn.ubuntu.com/4330-1/
- VENDOR_ADVISORYhttps://www.debian.org/security/2020/dsa-4717
- VENDOR_ADVISORYhttps://www.debian.org/security/2020/dsa-4719
- MISChttps://www.tenable.com/security/tns-2021-14