alpine 3.6
access weakness #288


Weakness Breakdown


An access weakness occurs when software does not properly implement permissions that could have unintended consequences if exploited by malicious actors. An example of this weakness is when a default username and password are set by the developer but do not get changed by the system administrator.

Warning code(s):

Ensure that umask is given most restrictive possible setting.

File Name:



The highlighted line of code below is the trigger point of this particular Alpine 3.6 access weakness.

	if (pfx_in == NULL) {
		snprintf(tmpfil, sizeof(tmpfil), "%s/nmhXXXXXX",
	} else {
		snprintf(tmpfil, sizeof(tmpfil), "%sXXXXXX", pfx_in);

	fd = mkstemp(tmpfil);
	if (fd < 0) {
		return NULL;
	if (fd_ret != NULL) {
		*fd_ret = fd;
		keep_open = 1;
	if (fp_ret != NULL) {
		FILE *fp = fdopen(fd, "w+");
		if (fp == NULL) {
			int olderr = errno;
			errno = olderr;
			return NULL;
		*fp_ret = fp;
		keep_open = 1;
	if (!keep_open) {
	return tmpfil;

** This version allows one to specify the directory the temp file should
** by created based on a given pathname.  Although m_mktemp() technically
** supports this, this version is when the directory is defined by
** a separate variable from the prefix, eliminating the caller from having
** to do string manipulation to generate the desired. pathname prefix.
** The pfx_in parameter specifies a basename prefix for the file.  If dir_in
** is NULL, then the defined temporary directory (see comments to m_mktemp()
** above) is used to create the temp file.
char *

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