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Exim Multiple RCE Vulnerabilities
Information
Severity
Severity
High
Family
Family
SMTP problems
CVSSv2 Base
CVSSv2 Base
7.5
CVSSv2 Vector
CVSSv2 Vector
AV:N/AC:L/Au:N/C:P/I:P/A:P
Solution Type
Solution Type
Vendor Patch
Created
Created
6 years ago
Modified
Modified
5 years ago
Summary
Exim is prone to multiple remote code execution vulnerabilities.
Insight
Insight
Exim is prone to multiple remote code execution vulnerabilities: - Use-after-free vulnerability while reading mail header (CVE-2017-16943) - Exim handles BDAT data incorrectly and leads to crash (CVE-2017-16944)
Affected Software
Affected Software
Exim version 4.88 and 4.89.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Apply the provided patch or update to version 4.90 or later. As a mitigation set 'chunking_advertise_hosts = ' in the Exim configuration.