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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.

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