All vulnerabilities
CVE-2018-6789

Exim Buffer Overflow Vulnerability

Exim EximNetwork & edge
Open in ThreatlineRecord JSON
CVSS
9.8Critical
ExploitationExploited in the wildAdded to KEV 3 Nov 2021. Known ransomware useCISA KEV
Exploit odds (EPSS)82.1%Chance of exploitation activity in the next 30 days, higher than 99% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Federal deadline3 May 2022Remediation due date for US federal agenciesCISA KEV
CISA required actionApply updates per vendor instructions. CISA KEV

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

  1. 8 Feb 2018, 23:00 UTCPublishedCVE List
  2. 2 May 2018Exploit code publicExploit-DB
  3. 3 Nov 2021Added to CISA KEVCISA KEV

Public exploit code and templates 2

  • Remote exploitExim < 4.90.1 - 'base64d' Remote Code Execution 2 May 2018Exploit-DB
  • Remote exploitexim 4.90 - Remote Code Execution 24 Oct 2018Exploit-DB

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

Description

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

Text from CVE List

Affected versions 1

  • n/aaffected: n/aCVE List

References 10