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@@ -0,0 +1,44 @@ |
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/** |
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* |
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* test for |
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* https://www.qualys.com/research/security-advisories/GHOST-CVE-2015-0235.txt |
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**/ |
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#include <netdb.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <errno.h> |
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#define CANARY "in_the_coal_mine" |
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struct { |
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char buffer[1024]; |
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char canary[sizeof(CANARY)]; |
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} temp = { "buffer", CANARY }; |
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int main(void) { |
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struct hostent resbuf; |
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struct hostent *result; |
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int herrno; |
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int retval; |
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/*** strlen (name) = size_needed - sizeof (*host_addr) - sizeof (*h_addr_ptrs) - 1; ***/ |
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size_t len = sizeof(temp.buffer) - 16*sizeof(unsigned char) - 2*sizeof(char *) - 1; |
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char name[sizeof(temp.buffer)]; |
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memset(name, '0', len); |
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name[len] = '\0'; |
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retval = gethostbyname_r(name, &resbuf, temp.buffer, sizeof(temp.buffer), &result, &herrno); |
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if (strcmp(temp.canary, CANARY) != 0) { |
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puts("vulnerable"); |
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exit(EXIT_SUCCESS); |
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} |
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if (retval == ERANGE) { |
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puts("not vulnerable"); |
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exit(EXIT_SUCCESS); |
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} |
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puts("should not happen"); |
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exit(EXIT_FAILURE); |
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} |