CVE-2018-6789

KEV
Published: Feb 08, 2018 Last Modified: Nov 07, 2025
ExploitDB:
Other exploit source:
Google Dorks:
CRITICAL 9,8
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
HIGH 7,5
Source: [email protected]
Access Vector: network
Access Complexity: low
Authentication: none
Confidentiality: partial
Integrity: partial
Availability: partial

Description

AI Translation Available

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.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,8644
Percentile
1,0th
Updated

EPSS Score Trend (Last 91 Days)

120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Incomplete
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Integrity Confidentiality Availability
Potential Impacts:
Modify Memory Execute Unauthorized Code Or Commands Dos: Crash, Exit, Or Restart Dos: Resource Consumption (Cpu)
Applicable Platforms
Languages: Assembly, C, C++, Memory-Unsafe
Likelihood of Exploit: High
View CWE Details
Exploit

Exim < 4.90.1 - 'base64d' Remote Code Execution

Remote

Exim < 4.90.1 - 'base64d' Remote Code Execution

Author: straight_blast Published:
View Exploit Code →
Exploit

exim 4.90 - Remote Code Execution

Remote

exim 4.90 - Remote Code Execution

Author: hackk.gr Published:
View Exploit Code →
Operating System

Debian Linux by Debian

Product Information
Vendor Debian
Product Debian Linux
Version 7.0
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Ubuntu Linux by Canonical

Product Information
Vendor Canonical
Product Ubuntu Linux
Version 16.04
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Ubuntu Linux by Canonical

Product Information
Vendor Canonical
Product Ubuntu Linux
Version 14.04
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Ubuntu Linux by Canonical

Product Information
Vendor Canonical
Product Ubuntu Linux
Version 17.10
cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Debian Linux by Debian

Product Information
Vendor Debian
Product Debian Linux
Version 8.0
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Debian Linux by Debian

Product Information
Vendor Debian
Product Debian Linux
Version 9.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Exim by Exim

Product Information
Vendor Exim
Product Exim
Version Range Affected
To 4.90.1 (exclusive)
cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://www.cisa.gov/known-exploited-vulnerabilities-catalo…
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018…
http://openwall.com/lists/oss-security/2018/02/10/2
http://openwall.com/lists/oss-security/2018/02/10/2
http://packetstormsecurity.com/files/162959/Exim-base64d-Bu…
http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html
https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploi…
https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-e…
https://exim.org/static/doc/security/CVE-2018-6789.txt
https://exim.org/static/doc/security/CVE-2018-6789.txt
https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1…
https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1
https://lists.debian.org/debian-lts-announce/2018/02/msg000…
https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html
https://usn.ubuntu.com/3565-1/
https://usn.ubuntu.com/3565-1/
https://www.debian.org/security/2018/dsa-4110
https://www.debian.org/security/2018/dsa-4110
https://www.exploit-db.com/exploits/44571/
https://www.exploit-db.com/exploits/44571/
https://www.exploit-db.com/exploits/45671/
https://www.exploit-db.com/exploits/45671/
http://www.openwall.com/lists/oss-security/2018/02/07/2
http://www.openwall.com/lists/oss-security/2018/02/07/2
http://www.securityfocus.com/bid/103049
http://www.securityfocus.com/bid/103049
http://www.securitytracker.com/id/1040461
http://www.securitytracker.com/id/1040461
http://openwall.com/lists/oss-security/2018/02/10/2
http://openwall.com/lists/oss-security/2018/02/10/2
http://packetstormsecurity.com/files/162959/Exim-base64d-Bu…
http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html
https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploi…
https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-e…
https://exim.org/static/doc/security/CVE-2018-6789.txt
https://exim.org/static/doc/security/CVE-2018-6789.txt
https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1…
https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1
https://lists.debian.org/debian-lts-announce/2018/02/msg000…
https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html
https://usn.ubuntu.com/3565-1/
https://usn.ubuntu.com/3565-1/
https://www.debian.org/security/2018/dsa-4110
https://www.debian.org/security/2018/dsa-4110
https://www.exploit-db.com/exploits/44571/
https://www.exploit-db.com/exploits/44571/
https://www.exploit-db.com/exploits/45671/
https://www.exploit-db.com/exploits/45671/
http://www.openwall.com/lists/oss-security/2018/02/07/2
http://www.openwall.com/lists/oss-security/2018/02/07/2
http://www.securityfocus.com/bid/103049
http://www.securityfocus.com/bid/103049
http://www.securitytracker.com/id/1040461
http://www.securitytracker.com/id/1040461