centos 7
format weakness #13

4

Weakness Breakdown


Definition:

A format string exploit occurs when the data of an input string is evaluated as a command by the program. This class of attacks is very similar to buffer overflows since an attacker could execute code, read the stack or cause new behaviors that compromise security. Learn more about format string attacks on OWASP attack index.

Warning code(s):

If format strings can be influenced by an attacker, they can be exploited.

File Name:

libcanberra-0.30/src/malloc.h

Context:

The highlighted line of code below is the trigger point of this particular Centos 7 format weakness.

 
#include "canberra.h"
#include "macro.h"

#ifndef PACKAGE
#error "Please include config.h before including this file!"
#endif

#define ca_malloc malloc
#define ca_free free
#define ca_malloc0(size) calloc(1, (size))
#define ca_strdup strdup
#ifdef HAVE_STRNDUP
#define ca_strndup strndup
#else
char *ca_strndup(const char *s, size_t n);
#endif

void* ca_memdup(const void* p, size_t size);

#define ca_new(t, n) ((t*) ca_malloc(sizeof(t)*(n)))
#define ca_new0(t, n) ((t*) ca_malloc0(sizeof(t)*(n)))
#define ca_newdup(t, p, n) ((t*) ca_memdup(p, sizeof(t)*(n)))

char *ca_sprintf_malloc(const char *format, ...) __attribute__((format(printf, 1, 2)));

#endif 

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