Exim Heap-Based Buffer Overflow Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 25/03/2022. Patch affected systems as an emergency.
| Package | Affected versions | Patched versions |
|---|---|---|
| exim | < 4.70 | 4.70 |
Heap-based buffer overflow in the string_vformat function in string.c in Exim before 4.70 allows remote attackers to execute arbitrary code via an SMTP session that includes two MAIL commands in conjunction with a large message containing crafted headers, leading to improper rejection logging.
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