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Vulnerability Details : CVE-2009-4020

Stack-based buffer overflow in the hfs subsystem in the Linux kernel 2.6.32 allows remote attackers to have an unspecified impact via a crafted Hierarchical File System (HFS) filesystem, related to the hfs_readdir function in fs/hfs/dir.c.
Publish Date : 2009-12-04 Last Update Date : 2017-09-19
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
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) Overflow
CWE ID 119

- Vendor Statements

This issue did not affect the version of the Linux kernel as shipped with Red Hat Enterprise MRG as the affected driver is not enabled in this kernel. It was addressed in Red Hat Enterprise Linux 4 and 5 via and respectively. Red Hat Enterprise Linux 3 is now in Production 3 of the maintenance life-cycle,, and this issue is rated as having low impact, therefore the fix for this issue is not currently planned to be included in the future updates.
Source: Redhat

- Additional Vendor Supplied Data

Vendor Impact CVSS Score CVSS Vector Report Date Publish Date
Redhat low
AV:L/AC:H/Au:N/C:N/I:N/A:C 2009-11-24 2009-12-04
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- Related OVAL Definitions

Title Definition Id Class Family
CVE-2009-4020 unix
DEPRECATED: ELSA-2010-0046 -- kernel security and bug fix update (important) oval:org.mitre.oval:def:27615 unix
DSA-2003 linux-2.6 -- privilege escalation/denial of service oval:org.mitre.oval:def:6841 unix
DSA-2003-1 linux-2.6 - several vulnerabilities oval:org.mitre.oval:def:20241 unix
DSA-2005 linux-2.6.24 -- privilege escalation/denial of service/sensitive memory leak oval:org.mitre.oval:def:7532 unix
ELSA-2010:0046: kernel security and bug fix update (Important) oval:org.mitre.oval:def:22940 unix
hfs Subsystem Stack-based Buffer Overflow Vulnerability oval:org.mitre.oval:def:6750 unix
RHSA-2010:0046: kernel security and bug fix update (Important) oval:com.redhat.rhsa:def:20100046 unix
RHSA-2010:0046: kernel security and bug fix update (Important) oval:org.mitre.oval:def:21777 unix
RHSA-2010:0076: kernel security and bug fix update (Important) oval:com.redhat.rhsa:def:20100076 unix
Stack-based buffer overflow in the hfs subsystem in the Linux kernel 2.6.32 allows remote attackers to have an unspecifi... oval:org.mitre.oval:def:10091 unix
SUSE-SU-2013:1832-1 -- Security update for Linux kernel oval:org.mitre.oval:def:25739 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-2009-4020

# Product Type Vendor Product Version Update Edition Language
1 OS Linux Linux Kernel 2.6.32 * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Linux Linux Kernel 1

- References For CVE-2009-4020
SUSE SUSE-SA:2010:019
SUSE SUSE-SA:2010:005
REDHAT RHSA-2010:0046
REDHAT RHSA-2010:0095
MLIST [oss-security] 20091204 CVE-2009-4020 kernel: hfs buffer overflow
MLIST [linux-mm-commits] 20091203 + hfs-fix-a-potential-buffer-overflow.patch added to -mm tree
OVAL oval:org.mitre.oval:def:6750
OVAL oval:org.mitre.oval:def:10091

- Metasploit Modules Related To CVE-2009-4020

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

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