Exim Mail Transfer Agent (MTA) Improper Input Validation. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 10/01/2022. Patch affected systems as an emergency.
| Package | Affected versions | Patched versions |
|---|---|---|
| exim | ≥ 4.87, ≤ 4.91 |
A flaw was found in Exim versions 4.87 to 4.91 (inclusive). Improper validation of recipient address in deliver_message() function in /src/deliver.c may lead to remote command execution.
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