Exim itself is not vulnerable to privilege escalation, but this particular flaw in exim can be used by the stackguard vulnerability (https://access.redhat.com/security/vulnerabilities/stackguard) to achieve privilege escalation.
CVSS v3 metrics
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
|CVSS3 Base Score||2.9|
|CVSS3 Base Metrics||CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N|
Affected Packages State
|Red Hat Enterprise Linux 5||exim||Will not fix|
CVE description copyright © 2017, The MITRE Corporation