PT-2019-1718 · Linux+5 · Policykit+5
Jann Horn
·
Publicado
2019-01-08
·
Atualizado
2024-06-15
·
CVE-2019-6133
CVSS v3.1
6.7
Média
| Vetor | AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
PolicyKit (aka polkit) versions 0.115
Description
The issue is related to insufficient access control in the PolicyKit library for Linux operating systems. It allows an attacker to bypass the "start time" protection mechanism due to the non-atomic nature of the fork() function, leading to improper caching of authorization decisions. This is caused by a lack of uid checking in the polkitbackendinteractiveauthority.c file.
Recommendations
For PolicyKit (aka polkit) version 0.115, consider restricting access to the polkitbackendinteractiveauthority.c file until a patch is available. As a temporary workaround, review and strengthen the authorization decisions and access control mechanisms to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Race Condition
Improper Access Control
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Identificadores relacionados
Produtos afetados
Alt Linux
Centos
Policykit
Red Hat
Suse
Ubuntu