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Last updated: 4/23/2014

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National Cyber Awareness System

Vulnerability Summary for CVE-2009-0787

Original release date: 03/24/2009
Last revised: 03/22/2012
Source: US-CERT/NIST

Overview

The ecryptfs_write_metadata_to_contents function in the eCryptfs functionality in the Linux kernel 2.6.28 before 2.6.28.9 uses an incorrect size when writing kernel memory to an eCryptfs file header, which triggers an out-of-bounds read and allows local users to obtain portions of kernel memory.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 4.9 (MEDIUM) (AV:L/AC:L/AU:N/C:C/I:N/A:N) (legend)
Impact Subscore: 6.9
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 (05/19/2009)
This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 2.1, 3, 4, and Red Hat Enterprise MRG. It was addressed in Red Hat Enterprise Linux 5 via: https://rhn.redhat.com/errata/RHSA-2009-0473.html .

References to Advisories, Solutions, and Tools

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External Source: OVAL
Name: oval:org.mitre.oval:def:11068
External Source: SECUNIA
Name: 35015
External Source: CONFIRM
Name: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=8faece5f906725c10e7a1f6caf84452abadbdc7b
External Source: OSVDB
Name: 52860
External Source: VUPEN
Name: ADV-2009-0802
Type: Advisory
External Source: CONFIRM
Name: http://www.vmware.com/security/advisories/VMSA-2009-0016.html
External Source: SECTRACK
Name: 1022177
External Source: SECUNIA
Name: 37471
External Source: CONFIRM
Name: http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.28.9
Type: Advisory
External Source: VUPEN
Name: ADV-2009-3316
External Source: XF
Name: linux-kernel-ecryptfs-information-disclosure(49355)
External Source: BID
Name: 34216
Type: Patch Information
External Source: SECUNIA
Name: 34422
Type: Advisory
External Source: OVAL
Name: oval:org.mitre.oval:def:8319
External Source: BUGTRAQ
Name: 20091120 VMSA-2009-0016 VMware vCenter and ESX update release and vMA patch release address multiple security issue in third party components
External Source: REDHAT
Name: RHSA-2009:0473

References to Check Content

Identifier: oval:org.mitre.oval:def:11068
Check System: http://oval.mitre.org/XMLSchema/oval-definitions-5
Identifier: oval:org.mitre.oval:def:8319
Check System: http://oval.mitre.org/XMLSchema/oval-definitions-5

Technical Details

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