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Linux Kernel Multiple Security Issues
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Secunia Advisory:
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SA25895
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Release Date:
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2007-07-02
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Last Update:
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2008-10-03
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Popularity:
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9,103 views
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Critical:
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Not critical
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Impact:
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Security Bypass
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-2007-3513
CVE-2008-1294
CVE-2008-4210
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Description:
Some security issues have been reported in the Linux Kernel, which can be exploited by malicious, local users to bypass certain security restrictions, to gain escalated privileges, or to cause a DoS (Denial of Service).
1) The USBLCD driver does not limit the memory consumption during writes to the device. This can be exploited to cause an out-of-memory condition by writing a large amount of data to an affected device.
Successful exploitation requires write access to a device using the driver.
2) An error in the implementation of the "sys_setrlimit()" system call can be exploited to bypass CPU time limits by setting RLIMIT_CPU to 0.
3) An error in the "ftruncate()" functionality can be exploited to potentially gain escalated group privileges by creating a file in a setgid directory.
Solution:
Update to version 2.6.22.
Provided and/or discovered by:
1) Reported by the vendor.
2) Reported by David Peer in a Zsh bug report.
3) Reported by David Watson in a kernel bug report.
Changelog:
2007-07-04: Added CVE reference.
2007-07-09: Updated "Solution" section.
2008-05-02: Added vulnerability #2 to the advisory. Added CVE reference and updated credits and "Original Advisory" section.
2008-09-24: Added vulnerability #3 to the advisory. Updated credits and the "Original Advisory" section.
2008-10-03: Added CVE reference.
Original Advisory:
1) http://kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.22-rc7
2) http://www.zsh.org/mla/workers/2007/msg00200.html
3) http://bugzilla.kernel.org/show_bug.cgi?id=8420
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About this Secunia Advisory
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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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