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Linux Kernel "vmsplice()" System Call Vulnerabilities
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Secunia Advisory:
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SA28835
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Release Date:
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2008-02-11
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Critical:
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Less critical
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Impact:
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Exposure of sensitive information
Privilege escalation
DoS
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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 2.6.x
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| | CVE reference: | CVE-2008-0009 (Secunia mirror)
CVE-2008-0010 (Secunia mirror)
CVE-2008-0600 (Secunia mirror)
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Description:
Some vulnerabilities have been reported in the Linux Kernel, which can be exploited by malicious, local users to cause a DoS (Denial of Service), disclose potentially sensitive information, and gain escalated privileges.
The vulnerabilities are caused due to the missing verification of parameters within the "vmsplice_to_user()", "copy_from_user_mmap_sem()", and "get_iovec_page_array()" functions in fs/splice.c before using them to perform certain memory operations. This can be exploited to e.g. read or write to arbitrary kernel memory via a specially crafted "vmsplice()" system call.
Successful exploitation allows attackers to e.g. gain "root" privileges.
Note: The affected system call first appeared in version 2.6.17.
Solution:
Update to version 2.6.23.16 or 2.6.24.2.
Provided and/or discovered by:
Wojciech Purczynskiof iSEC Security Research and qaaz
Original Advisory:
iSEC Security Research:
http://www.isec.pl/vulnerabilities/isec-0026-vmsplice_to_kernel.txt
qaaz:
http://milw0rm.com/exploits/5092
http://milw0rm.com/exploits/5093
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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