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Merge pull request openedx-unsupported#1807 from edx/derf/ghost_vulne…
…rability_tester apply glibc update if vulnerable to CVE-2015-0235
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/* | ||
* GHOST vulnerability check | ||
* http://www.openwall.com/lists/oss-security/2015/01/27/9 | ||
* Usage: gcc GHOST.c -o GHOST && ./GHOST | ||
*/ | ||
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#include <netdb.h> | ||
#include <stdio.h> | ||
#include <stdlib.h> | ||
#include <string.h> | ||
#include <errno.h> | ||
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#define CANARY "in_the_coal_mine" | ||
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struct { | ||
char buffer[1024]; | ||
char canary[sizeof(CANARY)]; | ||
} temp = { "buffer", CANARY }; | ||
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int main(void) { | ||
struct hostent resbuf; | ||
struct hostent *result; | ||
int herrno; | ||
int retval; | ||
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/*** strlen (name) = size_needed - sizeof (*host_addr) - sizeof (*h_addr_ptrs) - 1; ***/ | ||
size_t len = sizeof(temp.buffer) - 16*sizeof(unsigned char) - 2*sizeof(char *) - 1; | ||
char name[sizeof(temp.buffer)]; | ||
memset(name, '0', len); | ||
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) { | ||
puts("vulnerable"); | ||
exit(EXIT_SUCCESS); | ||
} | ||
if (retval == ERANGE) { | ||
puts("OK"); | ||
exit(EXIT_SUCCESS); | ||
} | ||
puts("should not happen"); | ||
exit(EXIT_FAILURE); | ||
} |
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