Command injection in Sudo - CVE-2017-1000367

Vulnerability identifier: #VU6846

CSH Severity: Low

CVSS v4: 5.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2017-1000367

CWE-ID: CWE-77

Exploitation vector: Local access

Exploit availability: Public exploit is available

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The weakness exists due to command validation flaw in the get_process_ttyname() function. A local attacker can issue a specially crafted sudo command, cause the system to recognize the user's tty as an arbitrary file and overwrite arbitrary files. Exploitation of the bug is possible in case a malicious user has sudo privileges, the system contains SELinux and sudo has been built on SELinux support.

Successful exploitation of the vulnerability results in root access to the system.

Sudo
Debian Linux
Arch Linux
Gentoo Linux
Amazon Linux AMI
Red Hat Enterprise Linux for x86_64
CentOS
SUSE Linux
Slackware Linux
Ubuntu
Fedora
Opensuse
sudo (Alpine package)
sudo
Cloud Magnum Orchestration

Update to version 1.8.20p1.

sudo (Alpine package) - update to 1.8.20_p1-r0
sudo - addressed in versions 1.8.20p1-1.fc24, 1.8.20p1-1.fc25, 1.8.20p1-1.fc26, 1.8.20p2-1.fc24, 1.8.20p2-1.fc25, 1.8.20p2-1.fc26

• Exploit #2389 - CVE-Exploit-Script () (April 7, 2020)
• Exploit #2132 - sudo_exploit (own implementation of the CVE-2017-1000367 sudo privilege escalation vulnerability in python) (March 18, 2020)
• Exploit #1224 - Sudo - 'get_process_ttyname()' Privilege Escalation (March 18, 2020)

• https://www.sudo.ws/alerts/linux_tty.html
• http://www.openwall.com/lists/oss-security/2017/05/30/16

• Privilege escalation in Sudo
• Slackware Linux update for sudo
• openSUSE update for sudo
• SUSE Linux update for sudo
• Gentoo update for sudo
• Arch Linux update for sudo
• Red Hat Linux update for sudo
• Ubuntu update for sudo
• Debian update for sudo
• Debian update for sudo
• CentOS 6 and 7 update for sudo
• Red Hat update for sudo
• Amazon Linux AMI update for sudo
• Amazon Linux AMI update for sudo
• SUSE Linux update for sudo
• SUSE Linux update for sudo
• OpenSUSE Linux update for sudo
• SUSE Linux update for sudo
• SUSE Linux update for sudo
• Command injection in sudo (Alpine package)
• Fedora 25 update for sudo
• Fedora 26 update for sudo
• Fedora 24 update for sudo
• Fedora 26 update for sudo
• Fedora 25 update for sudo
• Fedora 24 update for sudo