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Tool Directory

CVE-1999-1109

MediumPublished

Sendmail before 8.10.0 allows remote attackers to cause a denial of service by sending a series of ETRN commands then disconnecting from the server, while...

Published: Mar 9, 2002
Updated: Aug 1, 2024
Assigning CNA: mitre
Evidence observed: Dec 22, 1999

Primary CVSS

5.0/ 10Medium

nvd · CVSS 2.0

AV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS probability estimate

7.2%

Low · next 30 days

Percentile: 94.1%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Sendmail before 8.10.0 allows remote attackers to cause a denial of service by sending a series of ETRN commands then disconnecting from the server, while Sendmail continues to process the commands after the connection has been terminated.

Sources

Eric Allman Sendmail 8.9.1/8.9.3 - ETRN Denial of ServiceExploit
Michal Zalewski · linux · Dec 22, 1999

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