The MITRE CVE dictionary describes this issue as:
Exim 3.22 and earlier, in some configurations, does not properly verify the local part of an address when redirecting the address to a pipe, which could allow remote attackers to execute arbitrary commands via shell metacharacters.
Red Hat security errata
|Red Hat Powertools 6.2||RHSA-2001:176||January 08, 2002|
|Red Hat Powertools 7.0||RHSA-2001:176||January 08, 2002|
|Red Hat Powertools 7.1||RHSA-2001:176||January 08, 2002|
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For clarification or corrections please contact the Red Hat Security Response Team.