Withdrawn by the publisher.
A vulnerability in the command line parameter parsing code of Sudo could allow an authenticated, local attacker to execute commands or binaries with root privileges. The vulnerability is due to improper parsing of command line parameters that may result in a heap-based buffer overflow. An attacker could exploit this vulnerability by accessing a Unix shell on an affected device and then invoking the sudoedit command with crafted parameters or by executing a binary exploit. A successful exploit could allow the attacker to execute commands or binaries with root privileges. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sudo-privesc-jan2021-qnYQfcM ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sudo-privesc-jan2021-qnYQfcM"]
Sudo before 1.9.5p2 contains an off-by-one error that can result in a heap-based buffer overflow, which allows privilege escalation to root via "sudoedit -s" and a command-line argument that ends with a single backslash character.
Sudo before 1.9.5p2 has a Heap-based Buffer Overflow, allowing privilege escalation to root via "sudoedit -s" and a command-line argument that ends with a single backslash character:
The affected product calculates or uses an incorrect maximum or minimum value that is one more or one less than the correct value.CVE-2021-3156 has been assigned to this vulnerability. A CVSS v3 base score of 7.0 has been calculated; the CVSS vector string is (AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H).
Affected: openEuler:20.03-LTS: sudo, openEuler:20.03-LTS-SP1: sudo
A flaw was found in sudo. A heap-based buffer overflow was found in the way sudo parses command line arguments. This flaw is exploitable by any local user (normal users and system users, sudoers and non-sudoers), without authentication (i.e., the attacker does not need to know the user's password). Successful exploitation of this flaw could lead to privilege escalation. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.(CVE-2021-3156)\r\n\r\n The sudoedit personality of Sudo before 1.9.5 may allow a local unprivileged user to perform arbitrary directory-existence tests by winning a sudo_edit.c race condition in replacing a user-controlled directory by a symlink to an arbitrary path.(CVE-2021-23239)\r\n\r\n selinux_edit_copy_tfiles in sudoedit in Sudo before 1.9.5 allows a local unprivileged user to gain file ownership and escalate privileges by replacing a temporary file with a symlink to an arbitrary file target. This affects SELinux RBAC support in permissive mode. Machines without SELinux are not vulnerable.(CVE-2021-23240)\r\n\r\n
Security update for sudo
sudo: Heap buffer overflow in argument parsing
Security update for sudo
Affected: Ubuntu:Pro:14.04:LTS: sudo, Ubuntu:16.04:LTS: sudo, Ubuntu:18.04:LTS: sudo, Ubuntu:20.04:LTS: sudo
Sudo before 1.9.5p2 contains an off-by-one error that can result in a heap-based buffer overflow, which allows privilege escalation to root via "sudoedit -s" and a command-line argument that ends with a single backslash character.
TruControl laser control software from versions 2.14.0 to 3.14.0 use sudo versions affected by CVE-2021-3156. The affected sudo has a heap-based buffer overflow, allowing privilege escalation to root via "sudoedit -s" and a command-line argument that ends with a single backslash character.
Ein lokaler Angreifer kann eine Schwachstelle in sudo ausnutzen, um seine Privilegien zu erhöhen.