There is a buffer overflow when parsing command line parameters

[firmianay]

Hi friends!
When the parameter length is greater than 100 characters of MAX_CHAR, the strcpy function overflows. A length check can be performed to fix the problem.

#define MAX_CHAR (100)

	char umfile[MAX_CHAR];
	char navfile[MAX_CHAR];
	char outfile[MAX_CHAR];

	while ((result=getopt(argc,argv,"e:u:g:c:l:o:s:b:T:t:d:iv"))!=-1)
	{
		switch (result)
		{
		case 'e':
			strcpy(navfile, optarg);
			break;
		case 'u':
			strcpy(umfile, optarg);
			nmeaGGA = FALSE;
			break;
		case 'g':
			strcpy(umfile, optarg);
			nmeaGGA = TRUE;
			break;
		case 'c':
			// Static ECEF coordinates input mode
			staticLocationMode = TRUE;
			sscanf(optarg,"%lf,%lf,%lf",&xyz[0][0],&xyz[0][1],&xyz[0][2]);
			break;
		case 'l':
			// Static geodetic coordinates input mode
			// Added by scateu@gmail.com
			staticLocationMode = TRUE;
			sscanf(optarg,"%lf,%lf,%lf",&llh[0],&llh[1],&llh[2]);
			llh[0] = llh[0] / R2D; // convert to RAD
			llh[1] = llh[1] / R2D; // convert to RAD
			llh2xyz(llh,xyz[0]); // Convert llh to xyz
			break;
		case 'o':
			strcpy(outfile, optarg);
			break;

[firmianay]

https://nvd.nist.gov/vuln/detail/CVE-2021-37778
Discoverer: Chao Yang@CAERI