File created without restricting permissions

[ArielSAdamsNASA]

Describe the bug
Allows anyone to open and write the file, DstFileDesc.

Expected behavior
Must set user permissions to file.

Code snips

elf2cfetbl/elf2cfetbl.c

Line 1443 in 7a3d1ca

DstFileDesc = fopen(DstFilename, "w");

System observed on:
https://lgtm.com/projects/g/nasa/cFS/snapshot/20ff9b0c5aa6653815b9cd2feb4a02180b239737/files/tools/elf2cfetbl/elf2cfetbl.c?sort=name&dir=ASC&mode=heatmap

Additional context
Previously mentioned in ticket #28
References:

• https://lgtm.com/rules/1505913006104/
• https://cwe.mitre.org/data/definitions/732.html
• https://wiki.sei.cmu.edu/confluence/display/c/FIO06-C.+Create+files+with+appropriate+access+permissions

Reporter Info
Ariel Adams, ASRC Federal