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TITLE:
Linux Kernel Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA43537

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/43537/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=43537

RELEASE DATE:
2011-03-20

DISCUSS ADVISORY:
http://secunia.com/advisories/43537/#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/43537/

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=43537

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:
Vasiliy Kulikov has reported a weakness and some vulnerabilities in
the Linux Kernel, which can be exploited by malicious, local users to
disclose system information or cause a DoS (Denial of Service).

1) The "sco_sock_getsockopt_old()" function in net/bluetooth/sco.c is
not properly initialising a member of a certain structure before
copying it to userspace, which can be exploited to disclose kernel
stack memory.

2) The "bnep_sock_ioctl()" function in net/bluetooth/bnep/sock.c does
not properly terminate the device name, which can be exploited to
cause a "BUG()" or disclose system information.

3) The "do_replace()" function in net/bridge/netfilter/ebtables.c
does not properly terminate a string, which can be exploited to
disclose system information.

Successful exploitation of vulnerabilities #2 and #3 requires
CAP_NET_ADMIN capabilities.

SOLUTION:
Restrict access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
Vasiliy Kulikov

ORIGINAL ADVISORY:
1) https://lkml.org/lkml/2011/2/14/49
2) https://lkml.org/lkml/2011/2/14/50
3) https://lkml.org/lkml/2011/2/14/51

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/

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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.

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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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