Finally, the code that decides whether to remove the escape characters did not check whether a command is actually being run, just that the shell flag is set. "Because a command is not actually being run, sudo does not escape special characters. However, since it is a different bug this time being in the command line parsing code, running the sudoedit with either the -s or -is is possible. Moreover, Sudo adds that in most cases, these bugs are harmless. Read more: Linux M1 Chip Mac: Corellium Releases Early Beta of New OS for Download The sudoers policy plugin will then remove the escape characters from the arguments before evaluating the sudoers policy (which doesn't expect the escape characters) if the command is being run in shell mode." "When sudo runs a command in shell mode, either via the -s or -i command line option, it escapes special characters in the command's arguments with a backslash. In a detailed description, Sudo describes how the bug is exploitable. Now Sudo has prohibited this by fixing the bug, thanks to the reports coming from Qualys Security Advisory team. The file is a list of users who are permitted to access the su or sudo commands. The attacker can do so even if he/she is not listed to a configuration file called /etc/sudoers. It reportedly allows an attacker from low-privileged accounts to exploit such a tool in order to gain root access. Sudo has released an explanation on their official website what the Baron Samedit bug can do to accounts. Sudo Fixes 'Baron Samedit' Bug with the Help of Qualys Security Advisory Team On the other hand, the newest one is pretty simple compared to the other two. This is because they require complex processes in sudo setups to configure. The former bugs CVE-2019-14287 also known as the -1 UID bug and the CVE-2019-18634 also known as the pwfeedback bug were harmful but they were difficult to exploit. However, this recent one is considered as the most dangerous. Linux Sladshot comments that there have been two other Sudo bugs that have been discovered in the past two years.
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