Oracle Linux UEK 3.1/6.2 File Descriptor access control

Summaryinfo

A vulnerability has been found in Oracle Linux UEK 3.1/6.2 and classified as critical. Affected by this issue is some unknown functionality of the component File Descriptor Handler. Performing a manipulation results in access control. This vulnerability is cataloged as CVE-2022-21504. It is possible to initiate the attack remotely. There is no exploit available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in Oracle Linux UEK 3.1/6.2. It has been classified as critical. This affects an unknown part of the component File Descriptor Handler. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The code in UEK6 U3 was missing an appropiate file descriptor count to be missing. This resulted in a use count error that allowed a file descriptor to a socket to be closed and freed while it was still in use by another portion of the kernel. An attack with local access can operate on the socket, and cause a denial of service. CVSS 3.1 Base Score 6.2 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

The weakness was shared 06/15/2022 as 49c68f5f892d8c2be00e0a89ff2a035422c03b59. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2022-21504 since 11/15/2021. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

Applying the patch 49c68f5f892d8c2be00e0a89ff2a035422c03b59 is able to eliminate this problem. The bugfix is ready for download at github.com.

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Productinfo

Vendor

• Oracle

Name

• Linux UEK

Version

• 3.1
• 6.2

License

• commercial

Website

• Vendor: https://www.oracle.com

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