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Linux Kernel Information Disclosure and Denial of Service
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Secunia Advisory:
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SA20703
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Release Date:
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2006-06-20
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Last Update:
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2006-07-14
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Critical:
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Moderately critical
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Impact:
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Exposure of system information
Exposure of sensitive information
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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| | CVE reference: | CVE-2006-2445 (Secunia mirror)
CVE-2006-2448 (Secunia mirror)
CVE-2006-2936 (Secunia mirror)
CVE-2006-3085 (Secunia mirror)
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Description:
Some vulnerabilities have been reported in Linux Kernel, which can be exploited by malicious, local users to disclose potentially sensitive information and cause a DoS (Denial of Service), and by malicious people to cause a DoS.
1) Missing checks on the SCTP chunk length within the "xt_sctp" code may result in an infinite loop that exhausts system resources via a zero chunk length.
The vulnerability is related to #1 in:
SA19926
2) A race condition in run_posix_cpu_timers can be exploited by local users to cause a DoS (BUG_ON crash) by causing one CPU to attach a timer to a process that is exiting.
The vulnerability has been reported in versions prior to 2.6.16.21.
3) Missing access_ok checks on the arguments passed to the sys_debug_setcontext system call in signal_32.c and signal_64.c can potentially be exploited to read kernel memory or cause the system to crash on the PowerPC platform.
The vulnerability has been reported in versions prior to 2.6.16.21.
4) An error in the "ftdi_sio" driver can be exploited by malicious, local users to exhaust available memory by writing more data to the serial port than the driver is able to handle.
The vulnerability has been reported in versions prior to 2.6.17.
Solution:
Update to version 2.6.17.1.
http://kernel.org/
Provided and/or discovered by:
1) Reported by vendor.
2) John Stultz
3) Dave Jones
Changelog:
2006-06-26: Added information about additional vulnerabilities.
2006-07-14: Added information about additional vulnerability.
Original Advisory:
http://marc.theaimsgroup.com/?l=linux-kernel&m=115015841413687
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=194215
Kernel.org:
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.17.1
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.21
Other References:
SA19926:
http://secunia.com/advisories/19926/
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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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