National Vulnerability Database (NVD) National Vulnerability Database (CVE-2009-2691)

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Last updated: Tue May 21 01:28:42 EDT 2013

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Vulnerability Summary for CVE-2009-2691

Original release date:08/14/2009

Last revised:03/19/2012

Source: US-CERT/NIST

Overview

The mm_for_maps function in fs/proc/base.c in the Linux kernel 2.6.30.4 and earlier allows local users to read (1) maps and (2) smaps files under proc/ via vectors related to ELF loading, a setuid process, and a race condition.

Impact

CVSS Severity (version 2.0):

CVSS v2 Base Score:2.1 (LOW) (AV:L/AC:L/Au:N/C:P/I:N/A:N) (legend)

Impact Subscore: 2.9

Exploitability Subscore: 3.9

CVSS Version 2 Metrics:

Access Vector: Locally exploitable

Access Complexity: Low

Authentication: Not required to exploit

Impact Type:Allows unauthorized disclosure of information

Vendor Statements (disclaimer)

Official Statement from Red Hat (11/04/2009)

The Red Hat Security Response Team has rated this issue as having moderate security impact. We currently have no plans to fix this flaw in Red Hat Enterprise Linux 3, 4, and 5 as it is not possible to trigger the information leak if the suid_dumpable tunable is set to zero (which is the default). It was addressed in Red Hat Enterprise MRG via: https://rhn.redhat.com/errata/RHSA-2009-1540.html

References to Advisories, Solutions, and Tools

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External Source: MLIST

Name: [linux-kernel] 20090710 [PATCH 2/2] mm_for_maps: take ->cred_guard_mutex to fix the race

Type: Patch Information

Hyperlink:http://marc.info/?l=linux-kernel&m=124718949821250

External Source: MLIST

Name: [linux-kernel] 20090710 [PATCH 1/2] mm_for_maps: shift down_read(mmap_sem) to the caller

Type: Patch Information

Hyperlink:http://marc.info/?l=linux-kernel&m=124718946021193

External Source: MLIST

Name: [linux-kernel] 20090623 [PATCH 1/1] mm_for_maps: simplify, use ptrace_may_access()

Type: Patch Information

Hyperlink:http://lkml.org/lkml/2009/6/23/653