IBM CTSTRTCASD Utility Local File Corruption Vulnerability

It is reported that IBMs 'ctstrtcasd' utility is susceptible to a local file corruption vulnerability. This issue is due to a failure of the application to properly validate the permissions of the invoking user before overwriting a file specified by the user. This utility is setuid to the superuser, allowing for the overwriting of any file on affected computers, or the creation of files in any location.

As this vulnerability allows attackers to overwrite arbitrary files with superuser privileges, attackers have the ability to destroy data, or cause the computer to fail in such a manner that it will have to be reinstalled from backups. This will deny service to legitimate users.

RSCT versions and higher running on AIX 5.2 and 5.3 on pSeries, AIX on i5/OS (iSeries), Linux (pSeries, xSeries, zSeries), and pSeries/iSeries Hardware Management Console are reported vulnerable.


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