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Last updated: 10/20/2014 5:52:36 AM

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National Cyber Awareness System

Vulnerability Summary for CVE-2007-0004

Original release date: 09/18/2007
Last revised: 09/05/2008
Source: US-CERT/NIST

Overview

The NFS client implementation in the kernel in Red Hat Enterprise Linux (RHEL) 3, when a filesystem is mounted with the noacl option, checks permissions for the open system call via vfs_permission (mode bits) data rather than an NFS ACCESS call to the server, which allows local client processes to obtain a false success status from open calls that the server would deny, and possibly obtain sensitive information about file permissions on the server, as demonstrated in a root_squash environment. NOTE: it is uncertain whether any scenarios involving this issue cross privilege boundaries.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 1.9 (LOW) (AV:L/AC:M/Au:N/C:P/I:N/A:N) (legend)
Impact Subscore: 2.9
Exploitability Subscore: 3.4
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information

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External Source: CONFIRM
Name: https://bugzilla.redhat.com/show_bug.cgi?id=199715

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Technical Details

Vulnerability Type (View All)
  • Permissions, Privileges, and Access Control (CWE-264)