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| CodeSonar® 27.0w | AdaCore Inc |
An operation uses a network address that may have been tainted.
| Class Name | Tainted Network Address | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Significance | security | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mnemonic | IO.TAINT.ADDR | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Categories |
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| 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="Tainted Network Address" |
Japanese (ja)
#include <sys/socket.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
int use_specified_socket(FILE *f){
int status;
int socketfd;
char hostname[256];
struct addrinfo *res;
if (fgets(hostname, 256, f) == NULL ) return -1;
status = getaddrinfo(hostname, "80", NULL, &res);
if (status != 0) {return status;}
socketfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
if (socketfd == -1) {freeaddrinfo(res); return -1;}
status = connect(socketfd, /* 'Tainted Network Address' warning issued here
* ('Tainted Buffer Access' warning also issued when enabled)
*/
res->ai_addr,
res->ai_addrlen);
freeaddrinfo(res);
if (status < 0) {close(socketfd);return status;}
/* ...remainder of function */
return close(socketfd);
}
To reproduce this example, analyze it with the following configuration:
WARNING_FILTER += allow class="Tainted Network Address" # raised so taint is tracked through this example's expression TAINT_MAX_EXPRESSION_COMPLEXITY = 80
CodeSonar ships with library models that allow it to recognize functions such as libc bind() that take a network address parameter. If one of these functions is called with a potentially-tainted value in the network address 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 Tainted Network Address warnings.
The following configuration file parameters affect checks for this warning class.
To report problems with this documentation, please visit https://support.adacore.com/csm.