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TITLE:
Linux Kernel ELF Core Dump Privilege Escalation Vulnerability

SECUNIA ADVISORY ID:
SA15341

VERIFY ADVISORY:
http://secunia.com/advisories/15341/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

OPERATING SYSTEM:
Linux Kernel 2.6.x
http://secunia.com/product/2719/
Linux Kernel 2.4.x
http://secunia.com/product/763/
Linux Kernel 2.2.x
http://secunia.com/product/764/

DESCRIPTION:
Paul Starzetz has reported a vulnerability in the Linux kernel, which
can be exploited by malicious, local users to gain escalated
privileges.

The vulnerability is caused due to a signedness error in the Linux
ELF binary format loader's core dump function (elf_core_dump()) and
can be exploited to cause a buffer overflow via a specially crafted
ELF binary.

Successful exploitation makes it possible to gain root privileges and
execute arbitrary code with kernel privileges.

The vulnerability has been reported in versions 2.2 through
2.2.27-rc2, versions 2.4 through 2.4.31-pre1, and versions 2.6
through 2.6.12-rc4.

SOLUTION:
Update to version 2.6.11.9.
http://kernel.org/

Grant only trusted users access to affected systems.

PROVIDED AND/OR DISCOVERED BY:
Paul Starzetz, iSEC Security Research.

ORIGINAL ADVISORY:
Kernel.org:
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.11.9

iSEC Security Research:
http://www.isec.pl/vulnerabilities/isec-0023-coredump.txt

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About:
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