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Version 1.0 (freeware) allowed users to login into Linux based operating systems and to bypass the authentication process (allowing access to the system without knowing the password). In 2009 author of this software announced Kon-Boot for Linux and 32-bit Microsoft Windows systems. [ 7 ]
chntpw has no support for fully encrypted NTFS partitions (the only possible exceptions to this are encrypted partitions readable by Linux such as LUKS), usernames containing Unicode characters, or Active Directory passwords (with the exception of local users of systems that are members of an AD domain). The password changing feature is also ...
Regardless of whether password shadowing is in effect on a given system, the passwd file is readable by all users so that various system utilities (e.g., grep) can work (e.g., to ensure that user names existing on the system can be found inside the file), while only the root user can write to it. Without password shadowing, this means that an ...
The system also has hidden "antivirus" software that is capable of removing censored files that are remotely stored by the North Korean Secret Service. There is a user group called "administrator" in the operating system. Users do not have root access by default, but are able to elevate their privileges to root by running a built-in utility ...
It allowed the user name, domain name, and password hashes cached in memory by the Local Security Authority to be changed at runtime after a user was authenticated — this made it possible to 'pass the hash' using standard Windows applications, and thereby to undermine fundamental authentication mechanisms built into the operating system.
Kernel-mode rootkits run with the highest operating system privileges by adding code or replacing portions of the core operating system, including both the kernel and associated device drivers. [ citation needed ] Most operating systems support kernel-mode device drivers, which execute with the same privileges as the operating system itself.
Operating systems, like all software, may contain bugs in need of fixing or may be enhanced with the addition of new features; many UNIX systems come with a package manager for this. Patching the operating system in a secure manner requires that the software come from a trustworthy source and not have been altered since it was packaged.
Linux Pluggable Authentication Modules (PAM) is a suite of libraries that allow a Linux system administrator to configure methods to authenticate users. It provides a flexible and centralized way to switch authentication methods for secured applications by using configuration files instead of changing application code. [ 1 ]