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Category:   Application (E-mail Server)  >   Exim Vendors:   Exim.org
Exim Infinite Loop in bdat_getc() Lets Remote Users Consume Excessive Memory Resources
SecurityTracker Alert ID:  1039873
SecurityTracker URL:  http://securitytracker.com/id/1039873
CVE Reference:   CVE-2017-16944   (Links to External Site)
Updated:  Nov 27 2017
Original Entry Date:  Nov 27 2017
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  

Description:   A vulnerability was reported in Exim. A remote user can consume excessive memory on the target system.

A remote user can connect to the SMTP service and send a specially crafted BDAT command to trigger an infinite loop in bdat_getc() and consume all available stack memory on the target system.

meh reported this vulnerability.

Impact:   A remote user can consume excessive memory resources on the target system.
Solution:   The vendor has issued a source code fix, available at:

https://git.exim.org/exim.git/commit/4e6ae6235c68de243b1c2419027472d7659aa2b4

The vendor advisory is available at:

https://bugs.exim.org/show_bug.cgi?id=2201

Vendor URL:  bugs.exim.org/2201 (Links to External Site)
Cause:   State error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   None.


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