// For flags

CVE-2018-6789

Exim Buffer Overflow Vulnerability

Severity Score

9.8
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

4
*Multiple Sources

Exploited in Wild

Yes
*KEV

Decision

-
*SSVC
Descriptions

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.

Se ha descubierto un problema en la función base64d en el escuchador SMTP en Exim, en versiones anteriores a la 4.90.1. Al enviar un mensaje manipulado, podría ocurrir un desbordamiento de búfer. Esto puede emplearse para ejecutar código de forma remota.

Exim versions prior to 4.90.1 suffer from a base64d remote code execution vulnerability.

Exim contains a buffer overflow vulnerability in the base64d function part of the SMTP listener that may allow for remote code execution.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2018-02-06 CVE Reserved
  • 2018-02-08 CVE Published
  • 2019-10-10 First Exploit
  • 2021-11-03 Exploited in Wild
  • 2022-05-03 KEV Due Date
  • 2024-07-26 EPSS Updated
  • 2024-08-05 CVE Updated
CWE
  • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Exim
Search vendor "Exim"
Exim
Search vendor "Exim" for product "Exim"
< 4.90.1
Search vendor "Exim" for product "Exim" and version " < 4.90.1"
-
Affected
Debian
Search vendor "Debian"
Debian Linux
Search vendor "Debian" for product "Debian Linux"
7.0
Search vendor "Debian" for product "Debian Linux" and version "7.0"
-
Affected
Debian
Search vendor "Debian"
Debian Linux
Search vendor "Debian" for product "Debian Linux"
8.0
Search vendor "Debian" for product "Debian Linux" and version "8.0"
-
Affected
Debian
Search vendor "Debian"
Debian Linux
Search vendor "Debian" for product "Debian Linux"
9.0
Search vendor "Debian" for product "Debian Linux" and version "9.0"
-
Affected
Canonical
Search vendor "Canonical"
Ubuntu Linux
Search vendor "Canonical" for product "Ubuntu Linux"
14.04
Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04"
lts
Affected
Canonical
Search vendor "Canonical"
Ubuntu Linux
Search vendor "Canonical" for product "Ubuntu Linux"
16.04
Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04"
lts
Affected
Canonical
Search vendor "Canonical"
Ubuntu Linux
Search vendor "Canonical" for product "Ubuntu Linux"
17.10
Search vendor "Canonical" for product "Ubuntu Linux" and version "17.10"
-
Affected