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TI-2019-02835 Aliases CVE-2019-3823GHSA-xmjh-hmw3-hqhr

Out-of-bounds read in curl

Priority MEDIUM 40CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 2 fixed, 6 without a fix

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-125 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.04119 90th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Partial Red Hat: 2 advisoriesRed Hat: 2 fixed, 6 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
The Curl Projectcurl7.64.0—No fix listedCNA

CPE configurations NVD · 11

CPEVersionsRoleVendor
cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:*7.34.0 to before 7.64.0VulnerableHaxx
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*14.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*18.10VulnerableCanonical
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:netapp:clustered_data_ontap:*:*:*:*:*:*:*:*all versionsVulnerableNetApp
cpe:2.3:a:oracle:communications_operations_monitor:3.4:*:*:*:*:*:*:*3.4VulnerableOracle
cpe:2.3:a:oracle:communications_operations_monitor:4.0:*:*:*:*:*:*:*4.0VulnerableOracle
cpe:2.3:a:oracle:http_server:12.2.1.3.0:*:*:*:*:*:*:*12.2.1.3.0VulnerableOracle
  • cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:* Versions 7.34.0 to before 7.64.0 Vulnerable ·Haxx
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* Versions 18.10 Vulnerable ·Canonical
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:netapp:clustered_data_ontap:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·NetApp
  • cpe:2.3:a:oracle:communications_operations_monitor:3.4:*:*:*:*:*:*:* Versions 3.4 Vulnerable ·Oracle
  • cpe:2.3:a:oracle:communications_operations_monitor:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Oracle
  • cpe:2.3:a:oracle:http_server:12.2.1.3.0:*:*:*:*:*:*:* Versions 12.2.1.3.0 Vulnerable ·Oracle
Show 1 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:oracle:secure_global_desktop:5.4:*:*:*:*:*:*:*5.4VulnerableOracle
  • cpe:2.3:a:oracle:secure_global_desktop:5.4:*:*:*:*:*:*:* Versions 5.4 Vulnerable ·Oracle

Remediation

Red Hat 2 advisories

  • RHSA-2019:3701 Released 2019-11-05 · Red Hat rating Moderate
    curl security and bug fix update
    • Red Hat Enterprise Linux BaseOS (v. 8) curl-7.61.1-11.el8, libcurl-7.61.1-11.el8, libcurl-devel-7.61.1-11.el8 +1
  • RHSA-2019:1543 Released 2019-06-18 · Red Hat rating Important
    Red Hat JBoss Core Services Apache HTTP Server 2.4.29 SP2 security update
    • JBoss Core Services Apache HTTP Server 2.4.29 SP2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    The curl Project curl — USN-3882-1

    3 records Highest priority Priority MEDIUM 3 MEDIUM

    Other records, highest priority first

    Show all 3 records → Advisory →
  • Advisory ·

    The curl Project curl — DSA-4386

    3 records Highest priority Priority MEDIUM 3 MEDIUM

    Other records, highest priority first

    Show all 3 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
.NET Core 1.0 on Red Hat Enterprise LinuxAffectedNo fix planned: Out of support scope
.NET Core 1.1 on Red Hat Enterprise LinuxAffectedNo fix planned: Out of support scope
.NET Core 2.1 on Red Hat Enterprise LinuxAffectedNo fix planned: Will not fix
.NET Core 2.2 on Red Hat Enterprise LinuxAffectedNo fix planned: Out of support scope
Red Hat JBoss Core ServicesAffectedNo fix yet
Red Hat Software CollectionsAffectedNo fix yet: Fix deferred
JBoss Core Services Apache HTTP Server 2.4.29 SP2Fixed RHSA-2019:1543
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2019:3701
Not affected: 4 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat JBoss Web Server 5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-3823
  2. 2026-10-03 Alias added: GHSA-xmjh-hmw3-hqhr

References

Exploit 2

Patch 2

Advisory 4

Other 3

  • TI-2019-02834 Stack-based buffer overflow in curl CVSS 3.1CRITICAL 9.8
  • TI-2016-07082 Buffer overflow in curl CVSS 3.0CRITICAL 9.8
  • TI-2018-12049 Heap-based buffer overflow in curl: CVSS 3.0CRITICAL 9.8
  • TI-2016-07084 Heap-based buffer overflow in curl CVSS 3.0CRITICAL 9.8
  • TI-2016-07081 The function `read_data()` in security.c in curl before version 7.51.0 is vulnerable to memory double free. CVSS 3.0CRITICAL 9.8
  • TI-2016-07080 Use after free in curl CVSS 3.0CRITICAL 9.8
See all 17 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences