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


Get a tax break on purchases of Secunia Solutions!

If you are a U.S. company, you may be qualified for a tax break for your software purchases. Learn more at:
http://secunia.com/products/corporate/vim/section_179/


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

TITLE:
Linux Kernel "/proc/<pid>/" Permissions Handling Weakness

SECUNIA ADVISORY ID:
SA43496

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/43496/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=43496

RELEASE DATE:
2011-03-14

DISCUSS ADVISORY:
http://secunia.com/advisories/43496/#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/43496/

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=43496

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:
halfdog has discovered a weakness in the Linux Kernel, which can be
exploited by malicious, local users to bypass certain security
restrictions.

The weakness is caused due to improper permissions handling of opened
files within the "/proc/<pid>/" directory when a SUID program is being
executed. This can be exploited to disclose certain memory information
or manipulate some process settings (e.g. coredump_filter).

The weakness is confirmed in version 2.6.37. Other versions may also
be affected.

SOLUTION:
Restrict access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
halfdog

ORIGINAL ADVISORY:
halfdog:
http://www.halfdog.net/Security/2011/SuidBinariesAndProcInterface/

LKML:
https://lkml.org/lkml/2011/2/7/368

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.

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

Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org

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