CVE-2009-2692

Public on

Last Modified: UTC

Description

The CVE Program describes this issue as:

The Linux kernel 2.6.0 through 2.6.30.4, and 2.4.4 through 2.4.37.4, does not initialize all function pointers for socket operations in proto_ops structures, which allows local users to trigger a NULL pointer dereference and gain privileges by using mmap to map page zero, placing arbitrary code on this page, and then invoking an unavailable operation, as demonstrated by the sendpage operation (sock_sendpage function) on a PF_PPPOX socket.

Statement

Red Hat is aware of this issue. Please see https://access.redhat.com/articles/18053.

Red Hat is aware of this issue. Please see https://access.redhat.com/articles/18053.

Additional information

  • Bugzilla 516949: kernel: uninit op in SOCKOPS_WRAP() leads to privesc
  • CWE-456->CWE-476: Missing Initialization of a Variable leads to NULL Pointer Dereference
  • FAQ: Frequently asked questions about CVE-2009-2692

Common Vulnerability Scoring System (CVSS) Score Details

Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

CVSS v2 Score Breakdown
Red HatNVD

CVSS v2 Base Score

7.2

7.2

Attack Vector

Local

Local

Access Complexity

Low

Low

Authentication

None

None

Confidentiality Impact

Complete

Complete

Integrity Impact

Complete

Complete

Availability Impact

Complete

Complete

CVSS v2 Vector

Red Hat: AV:L/AC:L/Au:N/C:C/I:C/A:C

NVD: AV:L/AC:L/Au:N/C:C/I:C/A:C

Acknowledgements

Red Hat would like to thank Julien Tinnes (Google Security Team) and Tavis Ormandy for reporting this issue.

Frequently Asked Questions

Why is Red Hat's CVSS v3 score or Impact different from other vendors?

My product is listed as "Under investigation" or "Affected", when will Red Hat release a fix for this vulnerability?

What can I do if my product is listed as "Will not fix"?

What can I do if my product is listed as "Fix deferred"?

What is a mitigation?

I have a Red Hat product but it is not in the above list, is it affected?

Why is my security scanner reporting my product as vulnerable to this vulnerability even though my product version is fixed or not affected?

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