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TITLE:
Linux Kernel "ptrace()" and "mmap()" Vulnerabilities

SECUNIA ADVISORY ID:
SA15630

VERIFY ADVISORY:
http://secunia.com/advisories/15630/

CRITICAL:
Less critical

IMPACT:
Privilege escalation, DoS

WHERE:
Local system

OPERATING SYSTEM:
Linux Kernel 2.6.x
http://secunia.com/product/2719/

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

1) Insufficient address validation in "ptrace()" on the AMD64
platform can be exploited to crash the kernel by setting an invalid
segment base.

2) An error in the "mmap()" function may result in creation of memory
maps with a start address after the end address. This can be exploited
to cause a DoS or potentially gain escalated privileges.

SOLUTION:
Update to version 2.6.11.11.
http://kernel.org/

PROVIDED AND/OR DISCOVERED BY:
1) Alexander Nyberg
2) Chris Wright

ORIGINAL ADVISORY:
Kernel.org:
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.11.11

Ubuntu:
http://www.ubuntulinux.org/support/documentation/usn/usn-137-1

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

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