CVE-2018-1000805

Paramiko version 2.4.1, 2.3.2, 2.2.3, 2.1.5, 2.0.8, 1.18.5, 1.17.6 contains a Incorrect Access Control vulnerability in SSH server that can result in RCE. This attack appear to be exploitable via network connectivity.

Weakness

The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

Affected Software

Name	Vendor	Start Version	End Version
Paramiko	Paramiko	1.17.6 (including)	1.17.6 (including)
Paramiko	Paramiko	1.18.5 (including)	1.18.5 (including)
Paramiko	Paramiko	2.0.8 (including)	2.0.8 (including)
Paramiko	Paramiko	2.1.5 (including)	2.1.5 (including)
Paramiko	Paramiko	2.2.3 (including)	2.2.3 (including)
Paramiko	Paramiko	2.3.2 (including)	2.3.2 (including)
Paramiko	Paramiko	2.4.1 (including)	2.4.1 (including)
Red Hat Enterprise Linux 6	RedHat	python-paramiko-0:1.7.5-5.el6_10	*
Red Hat Enterprise Linux 6.4 Advanced Update Support	RedHat	python-paramiko-0:1.7.5-4.el6_4.1	*
Red Hat Enterprise Linux 6.5 Advanced Update Support	RedHat	python-paramiko-0:1.7.5-4.el6_5.1	*
Red Hat Enterprise Linux 6.6 Advanced Update Support	RedHat	python-paramiko-0:1.7.5-4.el6_6.1	*
Red Hat Enterprise Linux 6.6 Telco Extended Update Support	RedHat	python-paramiko-0:1.7.5-4.el6_6.1	*
Red Hat Enterprise Linux 6.7 Extended Update Support	RedHat	python-paramiko-0:1.7.5-4.el6_7.1	*
Red Hat Enterprise Linux 7	RedHat	python-paramiko-0:2.1.1-9.el7	*
Red Hat Virtualization 4 for Red Hat Enterprise Linux 7	RedHat	rhvm-appliance-0:4.2-20181026.1.el7	*
Red Hat Virtualization 4 for Red Hat Enterprise Linux 7	RedHat	imgbased-0:1.0.29-1.el7ev	*
Red Hat Virtualization 4 for Red Hat Enterprise Linux 7	RedHat	redhat-release-virtualization-host-0:4.2-7.3.el7	*
Red Hat Virtualization 4 for Red Hat Enterprise Linux 7	RedHat	redhat-virtualization-host-0:4.2-20181026.0.el7_6	*
Paramiko	Ubuntu	bionic	*
Paramiko	Ubuntu	cosmic	*
Paramiko	Ubuntu	devel	*
Paramiko	Ubuntu	esm-infra-legacy/trusty	*
Paramiko	Ubuntu	esm-infra/bionic	*
Paramiko	Ubuntu	esm-infra/xenial	*
Paramiko	Ubuntu	trusty	*
Paramiko	Ubuntu	trusty/esm	*
Paramiko	Ubuntu	upstream	*
Paramiko	Ubuntu	xenial	*

Potential Mitigations

Divide the product into anonymous, normal, privileged, and administrative areas. Reduce the attack surface by carefully mapping roles with data and functionality. Use role-based access control (RBAC) [REF-229] to enforce the roles at the appropriate boundaries.
Note that this approach may not protect against horizontal authorization, i.e., it will not protect a user from attacking others with the same role.
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
For example, consider using authorization frameworks such as the JAAS Authorization Framework [REF-233] and the OWASP ESAPI Access Control feature [REF-45].
For web applications, make sure that the access control mechanism is enforced correctly at the server side on every page. Users should not be able to access any unauthorized functionality or information by simply requesting direct access to that page.
One way to do this is to ensure that all pages containing sensitive information are not cached, and that all such pages restrict access to requests that are accompanied by an active and authenticated session token associated with a user who has the required permissions to access that page.

NVD	https://nvd.nist.gov/vuln/detail/CVE-2018-1000805
CWE	https://cwe.mitre.org/data/definitions/863.html

Incorrect Authorization

Weakness

Affected Software

Potential Mitigations

References