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Privilege escalation issue, uid greater than INT_MAX can successfully execute any systemctl command. –

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- linux - Privilege escalation issue, uid greater than INT_MAX can successfully execute any systemctl command. –

Credits: Redhat

The MITRE CVE dictionary describes this issue as:

A flaw was found in PolicyKit (aka polkit) 0.11 that allows a user with a uid greater than INT_MAX to successfully execute any systemctl command.

Find out more about CVE-2018-19788 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

This issue affects the versions of polkit as shipped with Red Hat Enterprise Linux 6 and 7.

Red Hat Enterprise Linux 6 is now in Maintenance Support 2 Phase of the support and maintenance life cycle. This has been rated as having a security impact of Moderate, and is not currently planned to be addressed in future . For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.

CVSS v3 metrics

NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.

CVSS3 Base Score 7
CVSS3 Base Metrics CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity Impact High
Availability Impact High

Affected Packages State

Platform Package State
Red Hat Virtualization 4 polkit Under investigation
Red Hat Enterprise Linux 7 polkit Affected
Red Hat Enterprise Linux 6 polkit Will not fix

Mitigation

Do not allow negative UIDs or UIDs greater than 2147483646.

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