![]() An attacker could exploit this vulnerability by calling the script with sudo. This vulnerability is due to insecure file permissions. ![]() The problem exists because a user-specified editor may contain a "-" argument that defeats a protection mechanism, e.g., an EDITOR='vim - /path/to/extra/file' value.Ī vulnerability in Cisco CX Cloud Agent of could allow an authenticated, local attacker to elevate their privileges. Affected versions are 1.8.0 through 1.9.12.p1. In Sudo before 1.9.12p2, the sudoedit (aka -e) feature mishandles extra arguments passed in the user-provided environment variables (SUDO_EDITOR, VISUAL, and EDITOR), allowing a local attacker to append arbitrary entries to the list of files to process. This presents a substantial security risk when running systemctl from Sudo, because less executes as root when the terminal size is too small to show the complete systemctl output. Specifically, systemd does not set LESSSECURE to 1, and thus other programs may be launched from the less program. Systemd before 247 does not adequately block local privilege escalation for some Sudo configurations, e.g., plausible sudoers files in which the "systemctl status" command may be executed. Sudo before 1.9.13p2 has a double free in the per-command chroot feature. Sudo before 1.9.13 does not escape control characters in log messages. Sudo before 1.9.13 does not escape control characters in sudoreplay output. This has security relevance because, for example, execution of Dmidecode via Sudo is plausible. Prior to versions 2.9.9 and 2.10.1, the `ckan` user (equivalent to Versions 2.9.9, 2.9.9-dev, 2.10.1, and 2.10.1-dev contain a patch.ĭmidecode before 3.5 allows -dump-bin to overwrite a local file. This allows the elevated execution of binaries without a password requirement.ĬKAN is an open-source data management system for powering data hubs and data portals. So, if you use Linux, you are highly recommended to update sudo package manually to the latest version as soon as it is available.Loxone Miniserver Go Gen.2 through 14.0.3.28 allows an authenticated operating system user to escalate privileges via the Sudo configuration. The vulnerability affects all Sudo versions prior to the latest released version 1.8.28, which has been released today, a few hours ago and would soon be rolled out as an update by various Linux distributions to their users. “Additionally, because the user ID specified via the -u option does not exist in the password database, no PAM session modules will be run.” User id into its username incorrectly treats -1, or its unsigned equivalent 4294967295, as 0, which is always the user ID of root user. ![]() What’s more interesting is that this flaw can be exploited by an attacker to run commands as root just by specifying the user ID “-1” or “4294967295.” The vulnerability, tracked as CVE-2019-14287 and discovered by Joe Vennix of Apple Information Security, is more concerning because the sudo utility has been designed to let users use their own login password to execute commands as a different user without requiring their password. How to Exploit this Bug? Just Sudo User ID -1 or 4294967295 ![]() “This can be used by a user with sufficient sudo privileges to run commands as root even if the Runas specification explicitly disallows root access as long as the ALL keyword is listed first in the Runas specification,” the Sudo developers say. So, even if a user has been restricted to run a specific, or any, command as root, the vulnerability could allow the user to bypass this security policy and take complete control over the system. However, since privilege separation is one of the fundamental security paradigms in Linux, administrators can configure a sudoers file to define which users can run what commands as to which users. Sudo, stands for “superuser do,” is a system command that allows a user to run applications or commands with the privileges of a different user without switching environments-most often, for running commands as the root user.īy default on most Linux distributions, the ALL keyword in RunAs specification in /etc/sudoers file, as shown in the screenshot, allows all users in the admin or sudo groups to run any command as any valid user on the system. The vulnerability in question is a sudo security policy bypass issue that could allow a malicious user or a program to execute arbitrary commands as root on a targeted Linux system even when the “sudoers configuration” explicitly disallows the root access. one of the most important, powerful, and commonly used utilities that comes as a core command installed on almost every UNIX and Linux-based operating system. ![]()
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