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CodeSonar® 9.2p0 CONFIDENTIAL CodeSecure Inc
C and C++
Binaries

IO.UT.PORT : Untrusted Network Port

Summary

A network function is called with an untrusted network port argument.

A network port argument is considered to be untrusted if:

Properties

Class Name Untrusted Network Port
Significance security
Mnemonic IO.UT.PORT
Categories
MisraC2025 MisraC2025:D.4.14 The validity of values received from external sources shall be checked
MisraC2023 MisraC2023:D.4.14 The validity of values received from external sources shall be checked
Misra2012 Misra2012:D.4.14 The validity of values received from external sources shall be checked
AUTOSARC++14 AUTOSARC++14:A27-0-1 Inputs from independent components shall be validated.
MisraC++2023 MisraC++2023:0.3.2 A function call shall not violate the function's preconditions
CWE CWE:99 Improper Control of Resource Identifiers ('Resource Injection')
  CWE:610 Externally Controlled Reference to a Resource in Another Sphere
CERT-C CERT-C:INT04-C Enforce limits on integer values originating from tainted sources
DISA-6r1 DISA-6r1:V-222606 The application must validate all input.
  DISA-6r1:V-222609 The application must not be subject to input handling vulnerabilities.
DISA-5r3 DISA-5r3:V-70265 The application must validate all input.
  DISA-5r3:V-70271 The application must not be subject to input handling vulnerabilities.
DISA-4r3 DISA-4r3:V-70265 The application must validate all input.
  DISA-4r3:V-70271 The application must not be subject to input handling vulnerabilities.
OWASP-2017 OWASP-2017:A1 Injection
OWASP-2021 OWASP-2021:A3 Injection
  OWASP-2021:A8 Software and data integrity failures
OWASP-2025 OWASP-2025:A05 Injection
  OWASP-2025:A08 Software or Data Integrity Failures
Availability Available for C and C++.
Enabling Checks for this warning class are disabled by default. To enable them, add the following WARNING_FILTER rule to the project configuration file. 
WARNING_FILTER += allow class="Untrusted Network Port"

Triggers

CodeSonar ships with library models that allow it to recognize functions such as libc getaddrinfo() that take a network port argument. If one of these functions is called with an untrusted value in the network port parameter position, a warning will be issued.

If you have created a custom library model for some function f() in terms of one of these existing models, calls to f() will also be capable of triggering Untrusted Network Port warnings.

Example

Suppose the project configuration file contains the following rule (this is part of the factory settings for NETWORK_PORT_WHITELIST).

NETWORK_PORT_WHITELIST += ^80$

Then CodeSonar will issue one Untrusted Network Port warning in the following code.

#include <stdlib.h>
#include <netdb.h>

int ut_port(const char *myhost, char *myport)
{
    int rv;
    struct addrinfo *res;
    /* 1234 not permitted by NETWORK_PORT_WHITELIST setting */
    rv = getaddrinfo( myhost, "1234", NULL, &res ); /* 'Untrusted Network Port' warning issued here */
    if (rv)  {
      /* 80 permitted by NETWORK_PORT_WHITELIST setting */
      rv = getaddrinfo( myhost, "80", NULL, &res );
    }
    if (rv==0){freeaddrinfo(res);}
    /* ... */
    return rv;
}

Relevant Configuration File Parameters

The following configuration file parameters affect checks for this warning class.

 

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