In PHP versions 7.2.x below 7.2.31, 7.3.x below 7.3.18 and 7.4.x below 7.4.6, when HTTP file uploads are allowed, supplying overly long filenames or field names could lead PHP engine to try to allocate oversized memory storage, hit the memory limit and stop processing the request, without cleaning up temporary files created by upload request. This potentially could lead to accumulation of uncleaned temporary files exhausting the disk space on the target server.
https://bugs.php.net/bug.php?id=78876
https://bugs.php.net/bug.php?id=78875
https://security.netapp.com/advisory/ntap-20200528-0006/
https://usn.ubuntu.com/4375-1/
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00045.html
https://lists.debian.org/debian-lts-announce/2020/06/msg00033.html
https://www.debian.org/security/2020/dsa-4717
https://www.debian.org/security/2020/dsa-4719
Source: MITRE
Published: 2020-05-20
Updated: 2021-07-22
Type: CWE-190
Base Score: 5
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
Impact Score: 2.9
Exploitability Score: 10
Severity: MEDIUM
Base Score: 5.3
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Impact Score: 1.4
Exploitability Score: 3.9
Severity: MEDIUM