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CVE-2018-14643: Theforeman: Command injection

CVE-2018-14643 is rated critical with a CVSS v3.0 base score of 9.8 and affects Theforeman. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.

Vulnerability description

An authentication bypass flaw was found in the smart_proxy_dynflow component used by Foreman. A malicious attacker can use this flaw to remotely execute arbitrary commands on machines managed by vulnerable Foreman instances, in a highly privileged context.

Severity breakdown

CVSS v3.0 9.8: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

• Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
• Attack complexity: Low. No special conditions; the attack can be repeated reliably.
• Privileges required: None. No account or prior access is needed.
• User interaction: None. No action from any user is needed.
• Scope: Unchanged. Impact stays within the vulnerable component.
• Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
• Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
• Availability impact: High. Total loss of availability; the component can be shut down.

Underlying weakness

CWE-287: Improper Authentication

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

Affected products

• Theforeman: all versions listed by NVD

References

• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14643
• http://www.securityfocus.com/bid/105375
• https://access.redhat.com/errata/RHSA-2018:2733
• https://github.com/theforeman/smart_proxy_dynflow/pull/54