| VID |
18119 |
| Severity |
40 |
| Port |
25 |
| Protocol |
TCP |
| Class |
SMTP |
| Detailed Description |
Exim, developed by the University of Cambridge, is an open-source Mail Transfer Agent for various Unix platforms. The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to cause a denial of service (infinite loop and stack exhaustion) via vectors involving BDAT commands and an improper check for a '.' character signifying the end of the content, related to the bdat_getc function.
* Note: This check requires an account with administrative privileges which can log into the host to scan. Absence of this condition will result in the check not being performed and a False Negative for all vulnerable hosts.
* References:
https://bugs.exim.org/show_bug.cgi?id=2201
https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html
* Platforms Affected:
Cambridge University, Exim versions prior to 4.88 and 4.89
Unix Any version
Linux Any version |
| Recommendation |
Upgrade to the latest exim package (4.89 later), available from the Exim Internet Mailer Web site at http://www.exim.org/ |
| Related URL |
CVE-2017-16944 (CVE) |
| Related URL |
(SecurityFocus) |
| Related URL |
(ISS) |
|
