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Linux Kernel Multiple Vulnerabilities
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Secunia Advisory:
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SA13784
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Release Date:
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2005-01-11
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Last Update:
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2008-06-02
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Critical:
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Less critical
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Impact:
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Exposure of system information
Exposure of sensitive information
Privilege escalation
DoS
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Where:
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Local system
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Solution Status:
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Partial Fix
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| OS: | Linux Kernel 2.2.x
Linux Kernel 2.4.x
Linux Kernel 2.6.x
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| | CVE reference: | CVE-2005-0179 (Secunia mirror)
CVE-2005-0504 (Secunia mirror)
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Description:
Multiple vulnerabilities have been reported in the Linux kernel, which potentially can be exploited by malicious, local users to cause a DoS (Denial of Service), disclose sensitive information, or gain escalated privileges on a vulnerable system.
1) A signedness error in the "poolsize_strategy()" function of the random poolsize sysctl handler (drivers/char/random.c) can potentially be exploited to cause a buffer overflow when copying data from user space into kernel space.
Successful exploitation may crash the system or allow execution of arbitrary code with escalated privileges. However, exploitation requires UID 0, but not root capabilities.
The vulnerability is reported in the 2.4 and 2.6 kernel branches.
2) Boundary errors in various functions of the MOXA serial driver (drivers/char/moxa.c) can be exploited to cause buffer overflows when copying data from user space into a kernel space buffer.
Successful exploitation may allow execution of arbitrary code with escalated privileges.
The vulnerabilities are reported in the 2.2, 2.4, and 2.6 kernel branches.
3) An unprivileged process can reportedly bypass the RLIMIT_MEMLOCK soft resource limit and lock more memory than permitted via the "mlockall()" system call.
The vulnerability is reported in versions 2.6.9 and 2.6.10.
Solution:
Vulnerability #2 is fixed in version 2.4.36.5 and 2.6.22.
Grant only trusted users access to affected systems.
Provided and/or discovered by:
1, 2) Brad Spengler
3) PaX Team
Changelog:
2005-01-24: Updated advisory.
2005-02-07: Added CVE reference.
2005-02-22: Added CVE reference.
2007-05-09: Updated "Solution" section.
2007-07-09: Updated "Solution" section.
2008-06-02: Updated "Solution" section. Added link to "Original Advisory" section.
Original Advisory:
http://kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.21-git10.log
http://kernel.org/pub/linux/kernel/v2.4/ChangeLog-2.4.36.5
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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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