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TITLE:
NetBSD Denial of Service and Privilege Escalation Vulnerabilities

SECUNIA ADVISORY ID:
SA41892

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/41892/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=41892

RELEASE DATE:
2010-10-21

DISCUSS ADVISORY:
http://secunia.com/advisories/41892/#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/41892/

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=41892

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:
Two vulnerabilities have been reported in NetBSD, which can be
exploited by malicious, local users to cause a DoS (Denial of
Service) or gain escalated privileges.

1) The "larn" game does not properly handling SETGID permissions,
which can be exploited to e.g. modify files in the "/var/games"
directory with privileges of the "games" group.

2) A signedness error in the "SMBIOC_OPENSESSION" ioctl of the netsmb
file system kernel module can be exploited to cause the kernel to
allocate large memory buffers and exhaust all memory.

SOLUTION:
Fixed in the CVS repository (please see the vendor advisory for
details).

PROVIDED AND/OR DISCOVERED BY:
The vendor credits:
1) David A. Holland.
2) Dan J. Rosenberg

ORIGINAL ADVISORY:
http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2010-009.txt.asc
http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2010-010.txt.asc

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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