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CVE Vulnerabilities

CVE-2023-3899

Improper Authorization

Published: Aug 23, 2023 | Modified: Nov 21, 2024
CVSS 3.x
7.8
HIGH
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
RedHat/V2
RedHat/V3
7.8 IMPORTANT
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Ubuntu
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2023-3899
CWEhttps://cwe.mitre.org/data/definitions/285.html

A vulnerability was found in subscription-manager that allows local privilege escalation due to inadequate authorization. The D-Bus interface com.redhat.RHSM1 exposes a significant number of methods to all users that could change the state of the registration. By using the com.redhat.RHSM1.Config.SetAll() method, a low-privileged local user could tamper with the state of the registration, by unregistering the system or by changing the current entitlements. This flaw allows an attacker to set arbitrary configuration directives for /etc/rhsm/rhsm.conf, which can be abused to cause a local privilege escalation to an unconfined root.

Weakness

The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.

Affected Software

NameVendorStart VersionEnd Version
Subscription-managerRedhat*1.28.39 (excluding)
Subscription-managerRedhat1.29.0 (including)1.29.37 (excluding)
Red Hat Enterprise Linux 7RedHatsubscription-manager-0:1.24.52-2.el7_9*
Red Hat Enterprise Linux 8RedHatsubscription-manager-0:1.28.36-3.el8_8*
Red Hat Enterprise Linux 8RedHatsubscription-manager-0:1.28.36-3.el8_8*
Red Hat Enterprise Linux 8.1 Update Services for SAP SolutionsRedHatsubscription-manager-0:1.25.17.1-2.el8_1*
Red Hat Enterprise Linux 8.2 Advanced Update SupportRedHatsubscription-manager-0:1.26.22-2.el8_2*
Red Hat Enterprise Linux 8.2 Telecommunications Update ServiceRedHatsubscription-manager-0:1.26.22-2.el8_2*
Red Hat Enterprise Linux 8.2 Update Services for SAP SolutionsRedHatsubscription-manager-0:1.26.22-2.el8_2*
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRedHatsubscription-manager-0:1.28.13-7.el8_4*
Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceRedHatsubscription-manager-0:1.28.13-7.el8_4*
Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsRedHatsubscription-manager-0:1.28.13-7.el8_4*
Red Hat Enterprise Linux 8.6 Extended Update SupportRedHatsubscription-manager-0:1.28.29.1-2.el8_6*
Red Hat Enterprise Linux 9RedHatsubscription-manager-0:1.29.33.1-2.el9_2*
Red Hat Enterprise Linux 9.0 Extended Update SupportRedHatsubscription-manager-0:1.29.26.2-2.el9_0*

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) 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.

References

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