Summaryinfo

A vulnerability categorized as problematic has been discovered in Linux Kernel 2.6.9. Affected by this issue is some unknown functionality. The manipulation results in access control. This vulnerability is reported as CVE-2011-1021. Moreover, an exploit is present. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel 2.6.9 (Operating System). It has been classified as problematic. Affected is an unknown functionality. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on integrity, and availability. CVE summarizes:

drivers/acpi/debugfs.c in the Linux kernel before 3.0 allows local users to modify arbitrary kernel memory locations by leveraging root privileges to write to the /sys/kernel/debug/acpi/custom_method file. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-4347.

The issue has been introduced in 10/19/2004. The weakness was disclosed 06/21/2012 (Website). The advisory is available at github.com. This vulnerability is traded as CVE-2011-1021 since 02/14/2011. The exploitability is told to be easy. Local access is required to approach this attack. The exploitation doesn't require any form of authentication. Technical details are unknown but a public exploit is available. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 2519 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 76634 (RHEL 6 : MRG (RHSA-2011:1253)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Red Hat Local Security Checks and running in the context l.

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (15774), Tenable (76634) and SecurityFocus (BID 45004†). The entries VDB-4433, VDB-6033, VDB-6034 and VDB-56206 are pretty similar. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 2.6.9

License

• open-source

Website

• Vendor: https://www.kernel.org/

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