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Category:   Application (E-mail Server)  >   Exim Vendors:
Exim Buffer Overflow in base64d() Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1040461
SecurityTracker URL:
CVE Reference:   CVE-2018-6789   (Links to External Site)
Date:  Mar 7 2018
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 4.90.1
Description:   A vulnerability was reported in Exim. A remote user can execute arbitrary code on the target system.

A remote user can send specially crafted SMTP data to trigger a buffer overflow in base64d() and execute arbitrary code on the target system. The code will run with the privileges of the target service.

The original advisory is available at:

Meh Chang, DEVCORE research team, reported this vulnerability.

Impact:   A remote user can execute arbitrary code on the target system.
Solution:   The vendor has issued a fix (4.90.1).

The vendor advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   None.

 Source Message Contents



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