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No exploitation reportedFix available

CVE-2019-19977

No exploitation reported by the sources we read.

  • Published2019-12-26
  • WeaknessCWE-125

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2019-12-2601:15CVE publishedNVD

Versions per branch

NVD
Libesmtp project libesmtp
BranchAffectedFixed in
1.0≤ 1.0.6no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • libesmtpSUSE:OpenStack Cloud Crowbar 9all versions · fixed in 1.0.6-17.3.1
  • libesmtpSUSE:OpenStack Cloud Crowbar 8all versions · fixed in 1.0.6-17.3.1
  • libesmtpSUSE:OpenStack Cloud 9all versions · fixed in 1.0.6-17.3.1
  • libesmtpSUSE:OpenStack Cloud 8all versions · fixed in 1.0.6-17.3.1
  • libesmtpSUSE:Manager Server 4.0all versions · fixed in 1.0.6-150.4.1
  • libesmtpSUSE:Manager Retail Branch Server 4.0all versions · fixed in 1.0.6-150.4.1
  • libesmtpSUSE:Manager Proxy 4.0all versions · fixed in 1.0.6-150.4.1
  • libesmtpSUSE:Linux Enterprise Software Development Kit 12 SP5all versions · fixed in 1.0.6-17.3.1

34 more package ranges on OSV.dev

Vendor advisories

  • CVE-2019-19977 Red Hat Product Security

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

Full record on NVD

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2019-12-26
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-cxg8-9wrx-2mhp

Frequently asked questions

What is CVE-2019-19977?

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.

Is CVE-2019-19977 actively exploited?

Active exploitation of CVE-2019-19977 has not been confirmed. Its EPSS score was 3.0% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-19977?

CVE-2019-19977 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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