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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.

Common Vulnerabilities and Exposures (CVE)