A vulnerability was found in Simple FTP Client and Server (version unknown) and classified as critical. This issue affects the function malloc of the file FTP/server_ftp.c. The manipulation of the argument size_packet with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is availability. The summary by CVE is:

The FTP (aka "Implementation of a simple FTP client and server") project through 96c1a35 allows remote attackers to cause a denial of service (memory consumption) by engaging in client activity, such as establishing and then terminating a connection. This occurs because malloc is used but free is not.

The weakness was published 01/02/2023. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2023-22551 since 01/01/2023. Technical details as well as a public exploit are known.

The exploit is available at github.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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• Simple FTP Client and Server

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