CVE-2019-19977

Libesmtp vulnerability

CVSS

9.8

EPSS

3.1%

EPSS pct

86th

Exploited

No known

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 vendor

Libesmtp Project

Affected product

Libesmtp

CVSS vector

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

Weakness type (CWE)

CWE-125 — Out-of-bounds Read

Published

2019-12-26

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 3.1% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 86% of all scored CVEs.

Check your external exposure to CVE-2019-19977

Confirm whether Libesmtp Project Libesmtp is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2019-19977.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2019-19977

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