Executive Summary

Informations
Name CVE-2018-6789 First vendor Publication 2018-02-08
Vendor Cve Last vendor Modification 2019-03-06

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Overall CVSS Score 9.8
Base Score 9.8 Environmental Score 9.8
impact SubScore 5.9 Temporal Score 9.8
Exploitabality Sub Score 3.9
 
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:P/I:P/A:P)
Cvss Base Score 7.5 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6789

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-119 Failure to Constrain Operations within the Bounds of a Memory Buffer

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 124
Os 3
Os 3

SAINT Exploits

Description Link
Exim SMTP listener base64d function one-character buffer overflow More info here

Snort® IPS/IDS

Date Description
2018-09-18 EHLO user overflow attempt
RuleID : 47541 - Revision : 2 - Type : SERVER-MAIL
2018-06-12 EHLO user overflow attempt
RuleID : 46610 - Revision : 3 - Type : SERVER-MAIL
2014-01-10 AUTH user overflow attempt
RuleID : 3824 - Revision : 16 - Type : SERVER-MAIL

Nessus® Vulnerability Scanner

Date Description
2018-03-09 Name : The remote Amazon Linux AMI host is missing a security update.
File : ala_ALAS-2018-970.nasl - Type : ACT_GATHER_INFO
2018-03-07 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201803-01.nasl - Type : ACT_GATHER_INFO
2018-03-06 Name : The remote mail server is potentially affected by a buffer overflow vulnerabi...
File : exim_4_90_1.nasl - Type : ACT_GATHER_INFO
2018-02-27 Name : The remote Fedora host is missing a security update.
File : fedora_2018-25a7ba3cb6.nasl - Type : ACT_GATHER_INFO
2018-02-27 Name : The remote Fedora host is missing a security update.
File : fedora_2018-5aec14e125.nasl - Type : ACT_GATHER_INFO
2018-02-12 Name : The remote Debian host is missing a security update.
File : debian_DLA-1274.nasl - Type : ACT_GATHER_INFO
2018-02-12 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-4110.nasl - Type : ACT_GATHER_INFO
2018-02-12 Name : The remote FreeBSD host is missing a security-related update.
File : freebsd_pkg_316b3c3e0e9811e88d4197657151f8c2.nasl - Type : ACT_GATHER_INFO

Sources (Detail)

Source Url
BID http://www.securityfocus.com/bid/103049
CONFIRM http://openwall.com/lists/oss-security/2018/02/10/2
https://exim.org/static/doc/security/CVE-2018-6789.txt
https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1
DEBIAN https://www.debian.org/security/2018/dsa-4110
EXPLOIT-DB https://www.exploit-db.com/exploits/44571/
https://www.exploit-db.com/exploits/45671/
MISC https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789...
MLIST http://www.openwall.com/lists/oss-security/2018/02/07/2
https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html
SECTRACK http://www.securitytracker.com/id/1040461
UBUNTU https://usn.ubuntu.com/3565-1/

Alert History

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Date Informations
2020-05-23 02:19:53
  • Multiple Updates
2020-05-23 01:18:58
  • Multiple Updates
2019-03-07 00:19:02
  • Multiple Updates
2018-10-26 17:19:45
  • Multiple Updates
2018-05-18 17:19:01
  • Multiple Updates
2018-05-05 09:19:33
  • Multiple Updates
2018-03-16 09:19:11
  • Multiple Updates
2018-03-12 09:19:25
  • Multiple Updates
2018-03-10 17:19:08
  • Multiple Updates
2018-03-09 09:19:04
  • Multiple Updates
2018-02-18 09:20:18
  • Multiple Updates
2018-02-12 13:21:47
  • Multiple Updates
2018-02-09 05:18:49
  • First insertion