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Category:   Application (E-mail Server)  >   Cyrus IMAP Server Vendors:   Carnegie Mellon University
(Apple Issues Fix for OS X) Cyrus IMAP Server Off-by-one Overflow in mysasl_canon_user() May Let Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1013500
SecurityTracker URL:  http://securitytracker.com/id/1013500
CVE Reference:   CVE-2004-1067   (Links to External Site)
Date:  Mar 22 2005
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.2.9 and prior versions
Description:   A vulnerability was reported in Cyrus IMAP Server in the mysasl_canon_user() function. A remote user may be able to execute arbitrary code on the target system.

The vendor reported an off-by-one error in the mysasl_canon_user() function that may result in an unterminated user name string. A remote user may be able to trigger the buffer overflow to execute arbitrary code on the target system with the privileges of the target IMAP process.

Impact:   A remote user may be able to execute arbitrary code on the target system with the privileges of the target IMAP service.
Solution:   Apple has issued a fix as part of Apple Security Update 2005-003, described at:

http://docs.info.apple.com/article.html?artnum=301061

Vendor URL:  asg.web.cmu.edu/cyrus/ (Links to External Site)
Cause:   Boundary error
Underlying OS:  UNIX (macOS/OS X)
Underlying OS Comments:  10.3.8

Message History:   This archive entry is a follow-up to the message listed below.
Dec 10 2004 Cyrus IMAP Server Off-by-one Overflow in mysasl_canon_user() May Let Remote Users Execute Arbitrary Code



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