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CVE-2021-21702 php: NULL pointer dereference in SoapClient
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 the SOAP extension's SoapClient class 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. This could lead to a Denial of Service.
If you are using the SoapClient in production, upgrade to 7.3.27 or later, 7.4.15 or later, or 8.0.2 or later. If you cannot upgrade, consider using a library such as phpro/soap-client, which does not use the SOAP extension.
Direct link to CVE-2021-21702 >
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