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Vulnerability Details : CVE-2009-2908

The d_delete function in fs/ecryptfs/inode.c in eCryptfs in the Linux kernel 2.6.31 allows local users to cause a denial of service (kernel OOPS) and possibly execute arbitrary code via unspecified vectors that cause a "negative dentry" and trigger a NULL pointer dereference, as demonstrated via a Mutt temporary directory in an eCryptfs mount.
Publish Date : 2009-10-13 Last Update Date : 2017-09-18
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- CVSS Scores & Vulnerability Types

CVSS Score
4.9
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) Denial Of ServiceExecute Code
CWE ID CWE id is not defined for this vulnerability

- Vendor Statements

The Linux kernel as shipped with Red Hat Enterprise Linux 3, 4, and Red Hat Enterprise MRG do not include support for eCryptfs, and therefore are not affected by this issue. It was addressed in Red Hat Enterprise Linux 5 via: https://rhn.redhat.com/errata/RHSA-2009-1548.html
Source: Redhat

- Additional Vendor Supplied Data

Vendor Impact CVSS Score CVSS Vector Report Date Publish Date
Redhat important
7.2
AV:L/AC:L/Au:N/C:C/I:C/A:C 2009-10-04 2009-09-22
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- Related OVAL Definitions

Title Definition Id Class Family
DSA-1915 linux-2.6 -- privilege escalation/denial of service/sensitive memory leak oval:org.mitre.oval:def:7639 unix
DSA-1915-1 linux-2.6 -- privilege escalation/denial of service/sensitive memory leak oval:org.mitre.oval:def:13588 unix
DSA-1928 linux-2.6.24 -- privilege escalation/denial of service/sensitive memory leak oval:org.mitre.oval:def:7937 unix
DSA-1928-1 linux-2.6.24 -- privilege escalation/denial of service/sensitive memory leak oval:org.mitre.oval:def:13351 unix
ELSA-2009:1548: kernel security and bug fix update (Important) oval:org.mitre.oval:def:22999 unix
Linux Kernel eCryptfs Lower Dentry Null Pointer Dereference Local Denial of Service Vulnerability oval:org.mitre.oval:def:6992 unix
RHSA-2009:1548 -- kernel security and bug fix update (Important) oval:org.mitre.oval:def:29269 unix
RHSA-2009:1548: kernel security and bug fix update (Important) oval:com.redhat.rhsa:def:20091548 unix
The d_delete function in fs/ecryptfs/inode.c in eCryptfs in the Linux kernel 2.6.31 allows local users to cause a denial... oval:org.mitre.oval:def:10216 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-2009-2908

# Product Type Vendor Product Version Update Edition Language
1 OS Linux Linux Kernel 2.6.31 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Linux Linux Kernel 1

- References For CVE-2009-2908

https://www.redhat.com/archives/fedora-package-announce/2009-October/msg00483.html
FEDORA FEDORA-2009-10525
http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.31.y.git;a=commit;h=afc2b6932f48f200736d3e36ad66fee0ec733136 CONFIRM
https://exchange.xforce.ibmcloud.com/vulnerabilities/53693
XF kernel-ecryptfs-dos(53693)
https://bugzilla.redhat.com/show_bug.cgi?id=527534 CONFIRM
http://www.ubuntu.com/usn/USN-852-1
UBUNTU USN-852-1
http://www.vupen.com/english/advisories/2010/0528
VUPEN ADV-2010-0528
https://bugs.launchpad.net/ecryptfs/+bug/387073
http://lists.vmware.com/pipermail/security-announce/2010/000082.html
MLIST [security-announce] 20100303 VMSA-2010-0004 ESX Service Console and vMA third party updates
http://www.openwall.com/lists/oss-security/2009/10/06/1
MLIST [oss-security] 20091006 Kernel ecryptfs CVE id (CVE-2009-2908)
http://www.securityfocus.com/bid/36639
BID 36639 Linux Kernel eCryptfs Lower Dentry Null Pointer Dereference Local Denial of Service Vulnerability Release Date:2010-05-28
https://rhn.redhat.com/errata/RHSA-2009-1548.html
REDHAT RHSA-2009:1548

- Metasploit Modules Related To CVE-2009-2908

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


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