CVE-2018-19788: Privilege escalation issue, uid greater than INT_MAX can successfully execute any systemctl command.
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Credits: Redhat
CVE-2018-19788
The MITRE CVE dictionary describes this issue as:
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 updates. 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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