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Category:   Application (Generic)  >   CVS Vendors:   GNU [multiple authors]
CVS Server Piped Checkout Input Validation Flaw Discloses RCS Files to Remote Authenticated Users
SecurityTracker Alert ID:  1009853
SecurityTracker URL:  http://securitytracker.com/id/1009853
CVE Reference:   CVE-2004-0405   (Links to External Site)
Updated:  Apr 19 2004
Original Entry Date:  Apr 19 2004
Impact:   Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 1.11.15
Description:   A vulnerability was reported in CVS. A remote authenticated user may be able to view arbitrary RCS files on the server.

It is reported that a remote authenticated user can invoke a piped checkout of paths above $CVSROOT to view the contents of RCS archive files anywhere on a CVS server. This flaw can reportedly be triggered using relative pathnames containing the '../' directory traversal strings.

Debian credited Derek Robert Price with discovering this flaw.

Impact:   A remote authenticated user can view RCS files located anywhere on the target system.
Solution:   The vendor has released a fixed version (1.11.15 stable, 1.12.7 development), available at:

http://ccvs.cvshome.org/servlets/ProjectDownloadList

Vendor URL:  www.cvshome.org/ (Links to External Site)
Cause:   Access control error, Input validation error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Apr 19 2004 (Debian Issues Fix) CVS Server Piped Checkout Input Validation Flaw Discloses RCS Files to Remote Authenticated Users
Debian has released a fix.
Apr 19 2004 (Slackware Issues Fix) CVS Server Piped Checkout Input Validation Flaw Discloses RCS Files to Remote Authenticated Users
Slackware has released a fix.
May 5 2004 (OpenBSD Issues Fix) CVS Server Piped Checkout Input Validation Flaw Discloses RCS Files to Remote Authenticated Users
OpenBSD has released a fix.



 Source Message Contents

Subject:  CVE-2004-0405



http://ccvs.cvshome.org/source/browse/ccvs/NEWS?rev=1.116.2.92&content-type=text/x-cvsweb-markup


1.11.15 stable

SERVER SECURITY ISSUES

* Piped checkouts of paths above $CVSROOT no longer work.  Previously, clients
    could have requested the contents of RCS archive files anywhere on a CVS
    server.

CLIENT SECURITY ISSUES

* Clients now check paths from the server to verify that they are within one of
    the sandboxes the user requested be updated.  Previously, a trojan server
    could have written or overwritten files anywhere the user had access,
    presenting a serious security risk.




 
 


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