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Linux Kernel Netfilter Weakness and Two SCTP Vulnerabilities
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Secunia Advisory:
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SA20185
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Release Date:
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2006-05-22
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Last Update:
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2007-09-17
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Critical:
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Moderately critical
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Impact:
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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-2006-0039 (Secunia mirror)
CVE-2006-1857 (Secunia mirror)
CVE-2006-1858 (Secunia mirror)
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Description:
Two vulnerabilities and a weakness have been reported in the Linux Kernel, which can be exploited by malicious, local users to cause a DoS (Denial of Service) and disclose potentially sensitive information, and by malicious people to cause a DoS.
1) An input validation error in SCTP when processing a HB-ACK chunk with a specially-crafted parameter length can be exploited to cause out-of-bounds memory access. This can potentially cause the system to crash.
2) An error in SCTP chunk length calculation during parameter processing can be exploited to cause out-of-bounds memory access. This can potentially cause the system to crash.
3) A race condition in the "do_add_counters()" function in netfilter can be exploited by local users to read kernel memory or cause the system to crash via a race condition that produces a size value that is different from the size of the allocated memory.
Successful exploitation requires that the user is granted CAP_NET_ADMIN rights.
Solution:
Update to version 2.6.16.17.
http://kernel.org/
Provided and/or discovered by:
1-2) Reported by vendor.
3) Solar Designer
Changelog:
2007-09-17: Corrected "Solution status".
Original Advisory:
Kernel.org:
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.17
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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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