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Linux Kernel Multiple Vulnerabilities
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Secunia Advisory:
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SA31048
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Release Date:
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2008-07-11
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Popularity:
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6,289 views
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Critical:
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Less critical
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Impact:
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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-2008-2812
CVE-2008-3077
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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) or to potentially gain escalated privileges.
1) Multiple NULL-pointer dereference errors exist within the tty handling in drivers/net/hamradio/6pack.c, drivers/net/hamradio/mkiss.c, drivers/net/irda/irtty-sir.c, drivers/net/ppp_async.c, drivers/net/ppp_synctty.c, drivers/net/slip.c, drivers/net/wan/x25_asy.c, and drivers/net/wireless/strip.c. These can be exploited to crash the kernel or potentially execute arbitrary code with escalated privileges.
2) An error within the "sys32_ptrace()" function in arch/x86/kernel/ptrace.c can be exploited to overflow the "refcount" field of the "task_struct" structure and trigger multiple use-after-free errors.
Successful exploitation of the vulnerability requires that the kernel is running on an x86-64 platform.
The vulnerabilities are reported in versions prior to 2.6.25.10.
Solution:
Update to version 2.6.25.10.
Provided and/or discovered by:
Reported as vulnerabilities by the PaX team.
Original Advisory:
http://lwn.net/Articles/288473/
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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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