Описание
A flaw was found in polkit. When processing an XML policy with 32 or more nested elements in depth, an out-of-bounds write can be triggered. This issue can lead to a crash or other unexpected behavior, and arbitrary code execution is not discarded. To exploit this flaw, a high-privilege account is needed as it's required to place the malicious policy file properly.
Отчет
This vulnerability was rated with a Moderate severity by the Red Hat Product Security team. Although it may eventually lead to code execution, for an attacker to exploit this vulnerability by using a malicious XML policy file, they must have a high-privileged account on the system. This happens because the directories that hold Polkit's policy files are owned by the root user, drastically reducing the attack surface for this vulnerability. Within regulated environments, a combination of the following controls acts as a significant barrier to successfully exploiting a CWE-787: Out-of-bounds Write vulnerability and therefore downgrades the severity of this particular CVE from Moderate to Low. The platform enforces hardening guidelines to apply the most restrictive settings necessary for operational requirements. Baseline configurations and system controls ensure secure software settings, while least functionality reduces the attack surface by disabling unauthorized services and ports. The environment employs IPS/IDS and antimalware solutions to detect and prevent malicious code exploiting out-of-bounds write vulnerabilities, using mechanisms such as file integrity monitoring and patch management. Robust input validation and error handling ensure all user inputs are thoroughly validated, preventing instability, data exposure, or privilege escalation. Finally, the platform uses memory protection mechanisms such as Data Execution Prevention (DEP) and Address Space Layout Randomization (ASLR) to strengthen resilience against out-of-bounds write exploits.
Меры по смягчению последствий
There's no known mitigation to this vulnerability other than avoiding the implementation of unknown or untrusted polkit policy files to the system.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 10 | polkit | Fix deferred | ||
| Red Hat Enterprise Linux 6 | polkit | Out of support scope | ||
| Red Hat Enterprise Linux 7 | polkit | Out of support scope | ||
| Red Hat Enterprise Linux 8 | polkit | Fix deferred | ||
| Red Hat Enterprise Linux 9 | polkit | Fix deferred | ||
| Red Hat OpenShift Container Platform 4 | rhcos | Fix deferred |
Показывать по
Дополнительная информация
Статус:
EPSS
6.7 Medium
CVSS3
Связанные уязвимости
A flaw was found in polkit. When processing an XML policy with 32 or more nested elements in depth, an out-of-bounds write can be triggered. This issue can lead to a crash or other unexpected behavior, and arbitrary code execution is not discarded. To exploit this flaw, a high-privilege account is needed as it's required to place the malicious policy file properly.
A flaw was found in polkit. When processing an XML policy with 32 or more nested elements in depth, an out-of-bounds write can be triggered. This issue can lead to a crash or other unexpected behavior, and arbitrary code execution is not discarded. To exploit this flaw, a high-privilege account is needed as it's required to place the malicious policy file properly.
A flaw was found in polkit. When processing an XML policy with 32 or m ...
EPSS
6.7 Medium
CVSS3