centos 6
buffer weakness #22

5

Weakness Breakdown


Definition:

Buffer overflows are one of the most well-known software vulnerabilities. Even though most developers know what buffer overflows are, attacks against the vulnerabilities are common in both legacy and newer applications. A classic buffer overflow exploit begins with the attacker sending data to a program, which it then stores in an undersized stack buffer. Besides stack buffer overflows, other kinds of buffer overflows include heap overflows, off-by-one errors and many others. Learn more about buffer overflows on OWASP attack index.

Warning code(s):

Easily used incorrectly.

File Name:

compat-db-4.6.21/db-4.3.29/tcl/tcl_seq.c

Context:

The highlighted line of code below is the trigger point of this particular Centos 6 buffer weakness.

 
	static const struct {
		u_int32_t flag;
		char *arg;
	} seq_flags[] = {
		{ DB_SEQ_INC, "-inc" },
		{ DB_SEQ_DEC, "-dec" },
		{ DB_SEQ_WRAP, "-wrap" },
		{ 0, NULL }
	};

	if (objc != 2) {
		Tcl_WrongNumArgs(interp, 1, objv, NULL);
		return (TCL_ERROR);
	}

	ret = seq->get_flags(seq, &flags);
	if ((result = _ReturnSetup(interp, ret, DB_RETOK_STD(ret),
	    "db get_flags")) == TCL_OK) {
		buf[0] = '\0';

		for (i = 0; seq_flags[i].flag != 0; i++)
			if (LF_ISSET(seq_flags[i].flag)) {
				if (strlen(buf) > 0)
					(void)strncat(buf, " ", sizeof(buf));
				(void)strncat(
				    buf, seq_flags[i].arg, sizeof(buf));
			}

		res = NewStringObj(buf, strlen(buf));
		Tcl_SetObjResult(interp, res);
	}

	return (result);
}
#endif /* HAVE_SEQUENCE */ 

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