Bypass in PolicyKit Authorization Mechanism for Various Linux Distributions
CVE-2019-6133

6.7MEDIUM

Key Information:

Vendor

Polkit Project

Status
Polkit
Vendor
CVE Published:
11 January 2019

What is CVE-2019-6133?

In PolicyKit version 0.115, a vulnerability exists that allows attackers to bypass the 'start time' protection mechanism. This issue arises because the fork() function is not atomic, which leads to improper caching of authorization decisions. Additionally, a lack of UID checking in the polkitbackend code exacerbates this vulnerability, potentially allowing unauthorized access to system resources across various Linux distributions.

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References

https://gitlab.freedesktop.org/polkit/polkit/commit/c898f...
x_refsource_MISC
https://usn.ubuntu.com/3903-2/
vendor-advisoryx_refsource_UBUNTU
https://access.redhat.com/errata/RHSA-2019:0230
vendor-advisoryx_refsource_REDHAT

CVSS V3.1

Score:
6.7
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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