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Category:   Application (Multimedia)  >   cdrtools Vendors:   Schilling, J.
Cdrtools Flaw in 'rscsi' Lets Local Users Modify Root-Owned Files to Grab Root Privileges
SecurityTracker Alert ID:  1007368
SecurityTracker URL:  http://securitytracker.com/id/1007368
CVE Reference:   CVE-2003-0655   (Links to External Site)
Updated:  Aug 6 2003
Original Entry Date:  Aug 1 2003
Impact:   Modification of system information, Root access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 2.01a18
Description:   A vulnerability was reported in cdrtools in the 'rscsi' binary. A local user can obtain root privileges.

Secure Network Operations Strategic Reconnaissance Team reported that the 'rscsi' helper application is configured with set user id (setuid) root user privileges and contains a flaw. The flaw reportedly allows a local user to cause root-owned files to be overwritten.

A local user can supply a specially crafted command line parameter to rscsi to cause the application to create an arbitrary root-owned debug file, overwriting a user-specified file, according to the report.

Impact:   A local user can overwrite files on the system with root level privileges to gain root access on the system.
Solution:   The vendor has reportedly released a fixed development version (2.01a18), available at:

ftp://ftp.berlios.de/pub/cdrecord/alpha/cdrtools-2.01a18.tar.gz

The author of the report has indicated that, as a workaround, you can remove the setuid bit from the affected application:

chmod -s /opt/schily/sbin/rscsi

Vendor URL:  www.fokus.fhg.de/research/cc/glone/employees/joerg.schilling/private/cdrecord.html (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   None.


 Source Message Contents

Subject:  [VulnWatch] SRT2003-08-01-0126 - cdrtools-2.x local root exploit


cdrtools-2.x contains a binary that can provide local root access for a 
non root user.

http://www.secnetops.com/research/advisories/SRT2003-08-01-0126.txt

-KF



 
 


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