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Secunia Security Advisory 41440

Secunia Security Advisory 41440
Posted Sep 15, 2010
Authored by Secunia | Site secunia.com

Secunia Security Advisory - Some weaknesses have been reported in the Linux Kernel, which can be exploited by malicious, local users to disclose certain system information.

tags | advisory, kernel, local
systems | linux
SHA-256 | 7e07527d4ec15f7fd8304588740de29d53cf7e1719baeccd461532545c74e95d

Secunia Security Advisory 41440

Change Mirror Download
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Windows Applications Insecure Library Loading

The Official, Verified Secunia List:
http://secunia.com/advisories/windows_insecure_library_loading/

The list is continuously updated as we confirm the vulnerability reports so check back regularly too see if any of your apps are affected.


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TITLE:
Linux Kernel Memory Leak Weaknesses

SECUNIA ADVISORY ID:
SA41440

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/41440/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=41440

RELEASE DATE:
2010-09-16

DISCUSS ADVISORY:
http://secunia.com/advisories/41440/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
* Last Update
* Popularity
* Comments
* Criticality Level
* Impact
* Where
* Solution Status
* Operating System / Software
* CVE Reference(s)

http://secunia.com/advisories/41440/

ONLY AVAILABLE IN CUSTOMER AREA:
* Authentication Level
* Report Reliability
* Secunia PoC
* Secunia Analysis
* Systems Affected
* Approve Distribution
* Remediation Status
* Secunia CVSS Score
* CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=41440

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
* AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
Some weaknesses have been reported in the Linux Kernel, which can be
exploited by malicious, local users to disclose certain system
information.

1) The "de4x5_ioctl()" function in drivers/net/tulip/de4x5.c
incorrectly copies an uninitialised structure member to userspace,
which can be exploited to disclose kernel stack memory via the
DE4X5_GET_REG IOCTL.

2) The "cxgb_extension_ioctl()" function in
drivers/net/cxgb3/cxgb3_main.c, the " eql_g_master_cfg()" function in
drivers/net/eql.c, and the "hso_get_count()" function in
drivers/net/usb/hso.c are not properly initializing all members of
certain structures before copying them to userspace, which can be
exploited to disclose kernel stack memory by sending certain IOCTLs.

SOLUTION:
Restrict access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
Dan Rosenberg

ORIGINAL ADVISORY:
1) http://lkml.org/lkml/2010/9/14/317
2) http://lkml.org/lkml/2010/9/11/170
http://lkml.org/lkml/2010/9/11/168
http://lkml.org/lkml/2010/9/11/167

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

----------------------------------------------------------------------

About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/advisories/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/


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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