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TITLE:
Ubuntu update for linux and linux-source-2.6.15

SECUNIA ADVISORY ID:
SA40012

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40012/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40012

RELEASE DATE:
2010-06-04

DISCUSS ADVISORY:
http://secunia.com/advisories/40012/#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/40012/

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=40012

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:
Ubuntu has issued an update for linux and linux-source-2.6.15. This
fixes some vulnerabilities, which can be exploited by malicious,
local users to disclose potentially sensitive information, bypass
certain security restrictions, cause a DoS (Denial of Service), and
potentially gain escalated privileges, and by malicious, local users
in a KVM guest to cause a DoS and potentially gain escalated
privileges, and by malicious people to cause a DoS.

For more information:
SA35265
SA38499
SA38594
SA38601
SA38718
SA39316
SA39344
SA39490

1) A vulnerability is caused due to an error within the handling of
protected Virtual Dynamically-linked Shared Object pages during a
segfault of a 32-bit process on a 64-bit system, which can be
exploited to cause a kernel crash.

2) An error within the SCTP implementation can be exploited to cause
a kernel crash by sending specially crafted SCTP packets to a
vulnerable system.

3) A NULL pointer dereference error within the
"ip6_dst_lookup_tail()" function can be exploited to cause a kernel
crash by sending specially crafted IPv6 traffic to a vulnerable
system.

4) An error exists within the implementation of the GFS2 file system,
which can be exploited by malicious, local users to trigger a
"BUG()".

5) An error exists within the implementation of the TIPC protocol,
which can be exploited by malicious, local users to cause a NULL
pointer dereference by sending datagrams through AF_TIPC before
entering the network mode.

6) A vulnerability is caused due to a use-after-free error within the
"tcp_rcv_state_process()" function, which can be exploited to cause a
kernel crash by e.g. sending a specially crafted IPv6 packet to a
listening socket with the IPV6_RECVPKTINFO option enabled.

Note: CVE-2009-4271, CVE-2010-0008, and CVE-2010-1188 only affect
Ubuntu 6.06 LTS. CVE-2010-0298, CVE-2010-0306, CVE-2010-0419,
CVE-2010-1084, CVE-2010-1088, and CVE-2010-1187 do not affect Ubuntu
6.06 LTS. CVE-2010-0437 and CVE-2010-0741 only affect Ubuntu 8.04
LTS.

SOLUTION:
Apply updated packages.

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

PROVIDED AND/OR DISCOVERED BY:
Ubuntu credits:
2) Wei Yongjun
3) Evgeniy Polyakov
4) Sachin Prabhu
5) Neil Horman
5) Masayuki Nakagawa

ORIGINAL ADVISORY:
USN-947-1:
https://lists.ubuntu.com/archives/ubuntu-security-announce/2010-June/001099.html

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.

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

Definitions: (Criticality, Where etc.)
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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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