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Vulnerability Details : CVE-2009-2691

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.
Publish Date : 2009-08-14 Last Update Date : 2017-08-16
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- CVSS Scores & Vulnerability Types

CVSS Score
2.1
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Obtain Information
CWE ID 200

- Vendor Statements

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
Source: Redhat

- Additional Vendor Supplied Data

Vendor Impact CVSS Score CVSS Vector Report Date Publish Date
Redhat moderate
2.1
AV:L/AC:L/Au:N/C:P/I:N/A:N 2009-08-07 2009-07-10
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- Related OVAL Definitions

Title Definition Id Class Family
DSA-2005 linux-2.6.24 -- privilege escalation/denial of service/sensitive memory leak oval:org.mitre.oval:def:7532 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2009-2691

# Product Type Vendor Product Version Update Edition Language
1 OS Linux Linux Kernel 2.6.30 Version Details Vulnerabilities
2 OS Linux Linux Kernel 2.6.30 Rc7-git6 Version Details Vulnerabilities
3 OS Linux Linux Kernel 2.6.30 RC6 Version Details Vulnerabilities
4 OS Linux Linux Kernel 2.6.30 RC1 Version Details Vulnerabilities
5 OS Linux Linux Kernel 2.6.30 RC2 Version Details Vulnerabilities
6 OS Linux Linux Kernel 2.6.30 RC3 Version Details Vulnerabilities
7 OS Linux Linux Kernel 2.6.30 RC5 Version Details Vulnerabilities
8 OS Linux Linux Kernel 2.6.30.1 Version Details Vulnerabilities
9 OS Linux Linux Kernel 2.6.30.2 Version Details Vulnerabilities
10 OS Linux Linux Kernel 2.6.30.4 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Linux Linux Kernel 10

- References For CVE-2009-2691

https://rhn.redhat.com/errata/RHSA-2009-1540.html
REDHAT RHSA-2009:1540
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01256.html
FEDORA FEDORA-2009-9044
https://exchange.xforce.ibmcloud.com/vulnerabilities/52401
XF linux-kernel-mmformaps-info-disclosure(52401)
https://bugzilla.redhat.com/show_bug.cgi?id=516171 CONFIRM
http://www.openwall.com/lists/oss-security/2009/08/11/1
MLIST [oss-security] 20090811 CVE-2009-2691 kernel: /proc/$pid/maps visible during initial setuid ELF loading
http://www.securityfocus.com/bid/36019
BID 36019 Linux Kernel 'fs/proc/base.c' Local Information Disclosure Vulnerability Release Date:2010-03-01
http://www.vupen.com/english/advisories/2009/2246
VUPEN ADV-2009-2246
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=00f89d218523b9bf6b522349c039d5ac80aa536d CONFIRM
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=13f0feafa6b8aead57a2a328e2fca6a5828bf286 CONFIRM
http://www.debian.org/security/2010/dsa-2005
DEBIAN DSA-2005
http://marc.info/?l=linux-kernel&m=124718949821250
MLIST [linux-kernel] 20090710 [PATCH 2/2] mm_for_maps: take ->cred_guard_mutex to fix the race
http://marc.info/?l=linux-kernel&m=124718946021193
MLIST [linux-kernel] 20090710 [PATCH 1/2] mm_for_maps: shift down_read(mmap_sem) to the caller
http://lkml.org/lkml/2009/6/23/653
MLIST [linux-kernel] 20090623 [PATCH 1/1] mm_for_maps: simplify, use ptrace_may_access()
http://lkml.org/lkml/2009/6/23/652
MLIST [linux-kernel] 20090623 [PATCH 0/1] mm_for_maps: simplify, use ptrace_may_access()
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=704b836cbf19e885f8366bccb2e4b0474346c02d CONFIRM

- Metasploit Modules Related To CVE-2009-2691

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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