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Linux Kernel "mremap()" Privilege Escalation Vulnerability
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Secunia Advisory:
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SA10532
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Release Date:
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2004-01-05
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Last Update:
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2004-03-09
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Popularity:
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17,556 views
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Critical:
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Less critical
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Impact:
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Privilege escalation
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Where:
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Local system
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Solution Status:
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Vendor Patch
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| OS: | Linux Kernel 2.4.x
Linux Kernel 2.6.x
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| CVE reference: | CVE-2003-0985
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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 2.4 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
Changelog:
2004-01-07: Further analysis reportedly shows that the 2.2.x version isn't affected. Updated affected systems and "Description" section.
2004-03-09: Added link to US-CERT vulnerability note.
Original Advisory:
http://isec.pl/vulnerabilities/isec-0013-mremap.txt
Other References:
CERT VU#490620:
http://www.kb.cert.org/vuls/id/490620
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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