CVE-2019-19977

libesmtp: Stack-based buffer over-read in ntlm_build_type_2() in ntlm/ntlmstruct.c

Published 26 Dec 2019Modified 17 Jun 2026CWE 125

In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Red Hat7.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H

Trivy's own label is CRITICAL. Rated critical by NVD, Azure Linux, CBL-Mariner. Rated lower by Red Hat (medium).

Description

libESMTP through 1.0.6 mishandles domain copying into a fixed-size buffer in ntlm_build_type_2 in ntlm/ntlmstruct.c, as demonstrated by a stack-based buffer over-read.

Affected packages and fixed versions

Source	Package	Fixed in
Azure Linux 3.0	libesmtp	0:1.0.6-21.azl3
CBL-Mariner 2.0	libesmtp	0:1.0.6-21.cm2
debian 11	libesmtp	no fix listed
debian 12	libesmtp	no fix listed
debian 13	libesmtp	no fix listed
debian 14	libesmtp	no fix listed
echo	libesmtp	no fix listed
rapidfort debian 12	libesmtp	no fix listed
rapidfort debian 13	libesmtp	no fix listed

References

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Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.