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[SA21369] Linux Kernel Ext3 Invalid Inode Number Denial of Service
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TITLE:
Linux Kernel Ext3 Invalid Inode Number Denial of Service
SECUNIA ADVISORY ID:
SA21369
VERIFY ADVISORY:
link://[click]
CRITICAL:
Less critical
IMPACT:
DoS
WHERE:
From local network
OPERATING SYSTEM:
Linux Kernel 2.6.x
link://[click]
DESCRIPTION:
James McKenzie has reported a vulnerability in Linux Kernel, which
can be exploited by malicious users to cause a DoS (Denial of
Service).
The vulnerability is caused due to an error in ext3 when handling an
invalid inode number. This can be exploited by sending a specially
crafted NFS request with a V2 procedure (e.g. V2_LOOKUP) that
specifies an invalid inode number.
Successful exploitation causes the exported directory to be remounted
read-only.
The vulnerability has been reported in versions 2.6.14.4, 2.6.17.6,
and 2.6.17.7. Other versions may also be affected.
SOLUTION:
Grant only trusted users access to affected systems.
PROVIDED AND/OR DISCOVERED BY:
James McKenzie
CHANGELOG:
link://[click]
About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.
Subscribe:
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Definitions: (Criticality, Where etc.)
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Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.
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