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CVE-2019-3823 libcurl

Affected softwarelibcurl
Severity7.5 High CVSS 3.0 3 scores
WeaknessOut-of-bounds read (CWE-125)
Published6 Feb 2019
Updated17 Jun 2026

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.

Exploitation status

No public exploit

No exploit has been reported in the sources we check. Published 7 years ago.
  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment exploitation: none
  • Indexed PoC none indexed
  • EPSS 4.1% chance in 30 days

Waratek protection

Outside Waratek scope

A Java vulnerability, but not one Waratek protects. It affects only Java on a user's desktop (applets, Web Start, JavaFX, the installer), sits in a product the Waratek agent can't be installed into, or is in a package we don't expect in business applications. The decision below says which.

  • Protection none
  • Action not pursued none
  • Review human Researcher
  • Record active
Decided by Manual classification of this CVE in the legacy dataset
Finding A manual classification set this CVE's status to Outside Waratek scope, but the CVE names a tracked product.

CVSS

7.5 HIGH v3.0 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 3 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.0 7.5 HIGH CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H NVD Primary published
CVSS 3.0 4.3 MEDIUM CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N secalert@redhat.com Secondary
CVSS 2.0 5.0 none AV:N/AC:L/Au:N/C:N/I:N/A:P NVD Primary

Affected software and releases

Products and versions

7 products, 11 version entries
SourceVendorProductSchemeAffected versions
nvd canonical ubuntu linux generic 14.04 · 16.04 · 18.04 · 18.10
nvd debian debian linux generic 9.0
nvd haxx libcurl generic ≥ 7.34.0 and ＜ 7.64.0
nvd netapp clustered data ontap generic any version
nvd oracle communications operations monitor generic 3.4 · 4.0
nvd oracle http server generic 12.2.1.3.0
nvd oracle secure global desktop generic 5.4

References

URLTags
http://www.securityfocus.com/bid/106950 Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2019:3701
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3823 Exploit, Issue Tracking, Patch, Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-936080.pdf
https://curl.haxx.se/docs/CVE-2019-3823.html Patch, Vendor Advisory
https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E
https://security.gentoo.org/glsa/201903-03 Third Party Advisory
https://security.netapp.com/advisory/ntap-20190315-0001/ Exploit, Third Party Advisory
https://usn.ubuntu.com/3882-1/ Third Party Advisory
https://www.debian.org/security/2019/dsa-4386 Third Party Advisory

Timeline
Published2019-02-06By the CVE Program.
NVD record modified2026-06-17NVD's own last-modified date for this record.