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Date: March 07, 1984 10:01
From: RUBIN
To: @LIST.DIS
I noticed a strange thing Friday in my main directory. My mail file MAIL.MAI, which is usually protected from read access by people other than myself, was NOT protected anymore! I know that it use to be protected as I check it often. So I thought to myself...."self, maybe other peoples mail files are also unprotected!" (This appears to be some strange bug somewhere, but who knows where!!) So I checked. And sure enough, a number of people had mail files that were not protected. "What does this all mean?", you ask. What it means is that anyone, regardless of any system or other privileges, may copy or type YOUR mail file. If you have letters in any of these files you would rather other people not be able to read, you should change the protection on these files. In case you are not familiar with the procedure, here is what you do: $SET PROT=(W,G) MAIL.MAI What this does is turn OFF access for "WORLD" and "GROUP". WORLD is everyone but yourself. This means anybody! GROUP is anyone with the same first 3 digits of your process id. Most everybody is in their OWN group, but there are a few cases where people share groups. If you don't want others in your group to read your mail, this should also be turned off. For more information on ACCESS PROTECTION, type HELP SPECIFY PROTECTION. If you are receiving this letter, the above applies to you. I only did a check on the file MAIL.MAI, but I checked ALL sub-directories as well. It is possible that a MAIL.MAI file is listed as unprotected but exists in a protected directory. If that is the case, you don't need to change the file itself. If you wish to check other files and protect them as well, you can check their PROTECTION code by doing a DIR/PROT on the directory. (Once again see HELP SPECIFY PROTECTION if your not sure what all the symbols mean.) Any questions may be referred back to me! Owen
Mar 07, 1984