| Package | Affected versions | Patched versions |
|---|---|---|
| sendmail | = 8.13.1.2 |
The version of Sendmail 8.13.1-2 on Red Hat Enterprise Linux 4 Update 4 and earlier does not reject the "localhost.localdomain" domain name for e-mail messages that come from external hosts, which might allow remote attackers to spoof messages.
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