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Insecure Library Loading
Not critical

Linux Kernel Memory Leak and Integer Overflow Vulnerability

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Release Date:  2010-09-08    Last Update:  2010-10-21    Views:  4,192

Secunia Advisory SA41284

Where:

Local system

Impact:

Exposure of system information, Exposure of sensitive information

Solution Status:

Vendor Patch

Operating System:

CVE Reference(s):

Description


A weakness and a vulnerability have been reported in the Linux Kernel, which can be exploited by malicious, local users to disclose certain system and potentially sensitive information.

1) The "xfs_ioc_fsgetxattr()" function in fs/xfs/linux-2.6/xfs_ioctl.c does not properly initialize all members of a certain structure before copying it to userspace, which can be exploited to disclose kernel stack memory by sending XFS_IOC_FSGETXATTR IOCTLs.

2) An integer overflow error within the "do_io_submit()" function in fs/aio.c can be exploited to disclose potentially sensitive memory areas.


Solution:
Update to version 2.6.36.

Provided and/or discovered by:
1) Dan Rosenberg
2) Tavis Ormandy

Original Advisory:
1) http://www.linux.sgi.com/cgi-bin/mesg.cgi?a=xfs-masters&i=AANLkTi%3DHdtMVJk7rCf89zirUcyn-5qc%2B50soVt%3D7dE6t%40mail.gmail.com
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=a122eb2fdfd78b58c6dd992d6f4b1aaef667eef9

2) https://bugzilla.redhat.com/show_bug.cgi?id=629441
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=75e1c70fc31490ef8a373ea2a4bea2524099b478

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Linux Kernel Memory Leak and Integer Overflow Vulnerability

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