OS Command Injection in Salt - CVE-2019-17361

Vulnerability identifier: #VU27599

CSH Severity: High

CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2019-17361

CWE-ID: CWE-78

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation the salt-api NET API with the ssh client enabled. A remote unauthenticated attacker with network access to the API endpoint can pass specially crafted data to the application and execute arbitrary OS commands on the salt-api host.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Salt
Arch Linux
Ubuntu
salt (Alpine package)
salt (Debian package)
salt-api (Ubuntu package)
salt-common (Ubuntu package)
salt-master (Ubuntu package)
salt-minion (Ubuntu package)

Install updates from vendor's website.

Salt - update to 2019.2.3
salt (Alpine package) - update to 3000.1-r2
salt (Debian package) - addressed in versions 2016.11.2+ds-1+deb9u3, 2018.3.4+dfsg1-6+deb10u1
salt-api (Ubuntu package) - addressed in versions 2015.8.8+ds-1ubuntu0.1, 2017.7.4+dfsg1-1ubuntu18.04.2
salt-common (Ubuntu package) - addressed in versions 2015.8.8+ds-1ubuntu0.1, 2017.7.4+dfsg1-1ubuntu18.04.2
salt-master (Ubuntu package) - addressed in versions 2015.8.8+ds-1ubuntu0.1, 2017.7.4+dfsg1-1ubuntu18.04.2
salt-minion (Ubuntu package) - addressed in versions 2015.8.8+ds-1ubuntu0.1, 2017.7.4+dfsg1-1ubuntu18.04.2

• http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00026.html
• https://docs.saltstack.com/en/latest/topics/releases/2019.2.3.html#security-fix
• https://github.com/saltstack/salt/commits/master

• Remote command execution via the salt-api NET API in SaltStack Salt
• Debian update for salt
• OS Command Injection in salt (Alpine package)
• Arch Linux update for salt
• Ubuntu update for salt