In PHP versions 7.3.x below 7.3.27, 7.4.x below 7.4.15 and 8.0.x below 8.0.2, when using SOAP extension to connect to a SOAP server, a malicious SOAP server could return malformed XML data as a response that would cause PHP to access a null pointer and thus cause a crash.
https://bugs.php.net/bug.php?id=80672
https://www.debian.org/security/2021/dsa-4856
https://security.netapp.com/advisory/ntap-20210312-0005/
https://security.gentoo.org/glsa/202105-23
https://lists.debian.org/debian-lts-announce/2021/07/msg00008.html
Source: MITRE
Published: 2021-02-15
Updated: 2021-12-10
Type: CWE-476
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: 7.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 3.9
Severity: HIGH