Description
libcurl versions from 7.34.0 to before 7.64.0 are vulnerable to a heap out-of-bounds read in the code handling the end-of-response for SMTP. If the buffer passed to `smtp_endofresp()` isn't NUL terminated and contains no character ending the parsed number, and `len` is set to 5, then the `strtol()` call reads beyond the allocated buffer. The read contents will not be returned to the caller.
Published: 2019-02-06
Score: 4.3 Medium
EPSS: 1.9% Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories
Source ID Title
Debian DLA Debian DLA DLA-1672-1 curl security update
Debian DSA Debian DSA DSA-4386-1 curl security update
EUVD EUVD EUVD-2019-13446 libcurl versions from 7.34.0 to before 7.64.0 are vulnerable to a heap out-of-bounds read in the code handling the end-of-response for SMTP. If the buffer passed to `smtp_endofresp()` isn't NUL terminated and contains no character ending the parsed number, and `len` is set to 5, then the `strtol()` call reads beyond the allocated buffer. The read contents will not be returned to the caller.
Ubuntu USN Ubuntu USN USN-3882-1 curl vulnerabilities
History

Wed, 15 Apr 2026 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Subscriptions

Canonical Ubuntu Linux
Debian Debian Linux
Haxx Libcurl
Netapp Clustered Data Ontap
Oracle Communications Operations Monitor Http Server Secure Global Desktop
Redhat Enterprise Linux Jboss Core Services
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-04-15T20:52:15.885Z

Reserved: 2019-01-03T00:00:00.000Z

Link: CVE-2019-3823

cve-icon Vulnrichment

Updated: 2024-08-04T19:19:18.612Z

cve-icon NVD

Status : Modified

Published: 2019-02-06T20:29:00.400

Modified: 2024-11-21T04:42:37.110

Link: CVE-2019-3823

cve-icon Redhat

Severity : Low

Publid Date: 2019-02-06T00:00:00Z

Links: CVE-2019-3823 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses