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.

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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
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

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'}


Projects

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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