[UNIX] IBM AIX libodm ODMPATH Stack Overflow Vulnerability
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- Date: 11 Jul 2007 10:21:17 +0200
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IBM AIX libodm ODMPATH Stack Overflow Vulnerability
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SUMMARY
AIX applications "use libodm to access system settings and device
configuration data stored in the Object Database Manager. The Manager is
responsible for accessing and updating such things as currently installed
software packages and devices. Many of the applications that use libodm
are installed set-uid root". Local exploitation of a buffer overflow
vulnerability in IBM Corp.'s AIX libodm library could allow an attacker to
execute arbitrary code on a targeted host.
DETAILS
Vulnerable Systems:
* AIX version 5.3 SP 4
The vulnerability exists in the processing of the ODMPATH environment
variable within the odm_searchpath() function. This function reads the
ODMPATH variable from the user provided environment, and then copies it
into a fixed sized stack buffer without properly validating its length.
This results in a stack-based buffer overflow, and allows the saved return
address to be overwritten.
Analysis:
Exploitation allows an attacker to execute code with root privileges.
Since this is a local attack, an attacker has complete control over the
process environment and can reliably place shellcode at known addresses.
This makes exploitation of this vulnerability trivial.
Vendor response:
IBM Corp. has addressed this vulnerability with interim fixes. More
information is available at the following URL:
<http://www-1.ibm.com/support/docview.wss?uid=isg1IY97632>
http://www-1.ibm.com/support/docview.wss?uid=isg1IY97632
Disclosure timeline:
04/02/2007 - Initial vendor notification
04/05/2007 - Initial vendor response
07/09/2007 - Coordinated public disclosure
ADDITIONAL INFORMATION
The information has been provided by
<mailto:idlabs-advisories@xxxxxxxxxxxx> iDefense Labs Security Advisories.
The original article can be found at:
<http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=552>
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=552
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