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Linux Kernel Security Bypass and Multiple Denial of Service Vulnerabilities
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Secunia Advisory:
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SA25955
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Release Date:
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2007-07-09
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Last Update:
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2008-07-21
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Popularity:
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10,782 views
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Critical:
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Moderately critical
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Impact:
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Security Bypass
DoS
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Where:
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From remote
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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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Secunia CVSS-2 Score:
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| Advisory Content (Page 1 of 3) | [ 1 ] [ 2 ] [ 3 ] | |
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Description:
Some vulnerabilities have been reported in the Linux Kernel, which can be exploited by malicious, local users to bypass certain security restrictions and cause a DoS (Denial of Service), and malicious people to cause a DoS.
1) An error within the "decode_choice()" function in net/netfilter/bf_conntrack_h323_asn1.c when handling choices that are still encoded in the fixed-size bitfield can be exploited to cause access to undefined types, resulting in a crash.
2) MSR bits are cleared after copying the state into the thread_struct. This can be exploited to cause corruption of the floating point state after returning from signal handlers, resulting in a DoS.
Successful exploitation requires a PowerPC based architecture.
3) The "do_change_type()" function in fs/namespace.c does not properly check for "CAP_SYS_ADMIN" privileges before performing certain operations. This can be exploited to e.g. mark private mounts as shared or mark a mount as unbindable.
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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