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Linux Kernel "do_brk()" Privilege Escalation Vulnerability
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Secunia Advisory:
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SA10328
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Release Date:
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2003-12-02
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Popularity:
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29,758 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
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Secunia CVSS-2 Score:
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| Advisory Content (Page 1 of 3) | [ 1 ] [ 2 ] [ 3 ] | |
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Description:
A vulnerability has been identified in the Linux kernel 2.4, which can be exploited by malicious, local users to escalate their privileges.
The problem is that the kernel function "do_brk()" fails to perform proper bounds checking, allowing users to create a large virtual memory area (VMA), which can include kernel memory. This gives the user access to kernel memory space.
While "do_brk()" can't be called directly by user space processes, it may be called through ELF and a.out loaders as well as the "brk()" system call. Successful exploitation provides full root privileges.
An exploit has been developed and is in the wild.
This has been reported to affect Linux kernel prior to 2.4.23.
Change Page:
[ 1 ] [ 2 ] [ 3 ]
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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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