BSD contains a flaw that may allow a malicious user to gain access to unauthorized privileges. The issue is triggered when the native bsd C language compiler translates chown(path, owner) in ex3.7preserve as chown(path, owner, 0), which permits the creation of a file in group 0. This flaw may lead to a loss of integrity.
Sendmail contains a flaw that may allow a local attacker to gain access to privileged files. The issue is due to the way Sendmail forwards mail via ~/.forward files. Accounts with a ~ in the login name, such as uucp, have world writeable home directories. If a local attacker creates a .forward file in the home directory, they can add arbitrary commands to the file. The next time mail is sent to the account, the contents of .forward will be executed with increased privileges.
Telecat BBS contains a flaw that may allow a malicious user to gain access to the BASIC interpreter. The issue occurs when a user performs a 'newscan' for the last board accessable, then types 'B' at the command prompt. Instead of advancing them to the next threat, Telecat may drop the user into the BASIC interpreter where any commands they issue will be executed, or it will advance them to the next thread regardless of security levels potentially disclosing private messages.
Telecat BBS contains a flaw that may allow a user to gain elevated privileges. The issue occurs when a user posts a message, types a line of text and attempts to center the text with a CTRL-V. In some cases, this will cause the program to fail and give access to the BASIC interpreter. In other cases, it may hang the BBS and require the SYSOP to reboot the system.
Multiple Vendors ship with the ability to use the Network File System (NFS) for sharing drives between computers. By default, many of these implementations have little or no security that protects the contents of the shared drives. Due to administrative oversight, drives are also frequently shared without care or thought as to the amount of information available. Rather than sharing a single directory, the entire drive (including sensitive system files) may become available to remote users. In other cases, drives are shared with insecure permissions allowing anyone to mount them, read the files, as well as write or delete files.
Many Unix versions contain a flaw that may allow a remote attacker to interfere with a user's session. The issue is due to in.talkd and/or walld not sanitizing user-supplied input. By sending a crafted set of escape characters, it is possible to disrupt a user's session in a way that prevents their screen from displaying characters properly. This will force a user to reset the session (which frequently did not work) or exit the session and relogin.
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