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Linux Kernel Security Bypass and Denial of Service
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Secunia Advisory:
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SA19926
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Release Date:
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2006-05-04
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Last Update:
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2006-05-24
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Popularity:
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11,447 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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| CVE reference: | CVE-2006-1527
CVE-2006-1856
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Description:
Two vulnerabilities have been reported in Linux Kernel, which can be exploited by malicious, local users to bypass certain security restrictions and by malicious people to cause a DoS (Denial of Service).
1) Missing checks on SCTP chunk sizes in the SCTP-netfilter code and may result in an infinite loop exhausting system resources.
2) Two missing Linux Security Modules (LSM) file permission hooks in the "do_compat_readv_writev()" function can be exploited by local users to bypass the LSM by using readv() or writev() using 32-bit compatible apps when running on a 64-bit kernel.
Solution:
Update to version 2.6.16.13 or later.
http://kernel.org/
Note: Vulnerability #2 has been fixed in version 2.6.16.12.
Provided and/or discovered by:
1) Reported by the vendor.
2) Al Viro
Changelog:
2006-05-24: Added information about additional vulnerability.
Original Advisory:
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.12
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.13
http://www.kernel.org/git/?p=linux/ke...0b4470e2e57f196a0e470898ae628725fb4c2
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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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