PHP 7.3.x < 7.3.13 Multiple Vulnerabilities

critical Web App Scanning Plugin ID 98926

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Synopsis

Description

According to its banner, the version of PHP running on the remote web server is prior to 7.2.26, 7.3.x prior to 7.3.13, or 7.4.x prior to 7.4.1. It is, therefore, affected by multiple vulnerabilities:

- An arbitrary file read vulnerability exists in link() and DirectoryIterator class due to improper handling of embedded \0 byte character and treats them as terminating at that byte. An attacker can exploit this to disclose information in applications checking paths that the code is allowed to access. (CVE-2019-11044 / CVE-2019-11045)

- An out-of-bounds READ error exists in the bcmath extension due to an input validation error. An unauthenticated, remote attacker can exploit this by supplying a string containing characters that are identified as numeric by the OS but are not ASCII number. This can cause lead to the disclosure of information within some memory locations. (CVE-2019-11046)

- An out-of-bounds READ error exists in parsing EXIF information from an image. An unauthenticated, remote attacker can exploit this and supply it iwth data that will cause it to read past the allocated buffer disclosing of information. (CVE-2019-11047 / CVE-2019-11050)

- A denial of service (DoS) vulnerability exists in mail() due to the double-freeing of certain memory locations. An unauthenticated, remote attacker can exploit this issue, by supplying custom headers, and to cause the application to segfault and stop responding.

Note that the scanner has not tested for these issues but has instead relied only on the application's self-reported version number.