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[SA10532] Linux Kernel "mremap()" Privilege Escalation Vulnerability
From: Secunia Security Advisories (sec-adv
secunia.com)
Date: Mon Jan 05 2004 - 10:25:41 CST
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TITLE:
Linux Kernel "mremap()" Privilege Escalation Vulnerability
SECUNIA ADVISORY ID:
SA10532
VERIFY ADVISORY:
http://www.secunia.com/advisories/10532/
CRITICAL:
Less critical
IMPACT:
Privilege escalation
WHERE:
Local system
OPERATING SYSTEM:
Linux Kernel 2.6.x
Linux Kernel 2.4.x
Linux Kernel 2.2.x
DESCRIPTION:
Paul Starzetz and Wojciech Purczynski have reported a vulnerability
in the Linux kernel, which can be exploited by malicious, local users
to escalate their privileges.
The vulnerability is caused due to a boundary error in the "mremap()"
system call. This may lead to the creation of a 0 bytes virtual
memory area (VMA), which disrupts kernel memory management.
Successful exploitation allows execution of arbitrary code with
kernel level privileges.
The vulnerability has been reported in the 2.2, 2.4, and 2.6 series.
SOLUTION:
The vulnerability has been fixed in version 2.4.24.
http://www.kernel.org/
Grant only trusted users access to affected systems.
PROVIDED AND/OR DISCOVERED BY:
Paul Starzetz and Wojciech Purczynski
ORIGINAL ADVISORY:
http://isec.pl/vulnerabilities/isec-0013-mremap.txt
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