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TI-2018-10483 Aliases CVE-2018-14618GHSA-4mp9-8964-jxmg

Heap-based buffer overflow in [UNKNOWN] curl

Priority MEDIUM 56CWE-122Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 15 fixed, 6 without a fix

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-122 and the CVSS impact.

Summary

curl before version 7.61.1 is vulnerable to a buffer overrun in the NTLM authentication code. The internal function Curl_ntlm_core_mk_nt_hash multiplies the length of the password by two (SUM) to figure out how large temporary storage area to allocate from the heap. The length value is then subsequently used to iterate over the password and generate output into the allocated storage buffer. On systems with a 32 bit size_t, the math to calculate SUM triggers an integer overflow when the password length exceeds 2GB (2^31 bytes). This integer overflow usually causes a very small buffer to actually get allocated instead of the intended very huge one, making the use of that buffer end up in a heap buffer overflow. (This bug is almost identical to CVE-2017-8816.)

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.11115 95th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 15 fixed, 6 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
[UNKNOWN]curl7.61.1—No fix listedCNA
  • curl Vendor[UNKNOWN] Affected 7.61.1 Fixed in — No fix listed CNA

CPE configurations NVD · 11

CPEVersionsRoleVendor
cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:*before 7.61.1VulnerableHaxx
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*12.04VulnerableCanonical
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:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:7.4:*:*:*:*:*:*:*7.4VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:7.5:*:*:*:*:*:*:*7.5VulnerableRed Hat
  • cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:* Versions before 7.61.1 Vulnerable ·Haxx
  • cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* Versions 12.04 Vulnerable ·Canonical
  • 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:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:7.5:*:*:*:*:*:*:* Versions 7.5 Vulnerable ·Red Hat
Show 1 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:redhat:enterprise_linux:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
  • cpe:2.3:o:redhat:enterprise_linux:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat

Remediation

Red Hat 2 advisories

  • RHSA-2019:1880 Released 2019-07-29 · Red Hat rating Low
    curl security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) curl-7.29.0-51.el7_6.3, libcurl-7.29.0-51.el7_6.3
    • Red Hat Enterprise Linux Client Optional (v. 7) libcurl-devel-7.29.0-51.el7_6.3
    • Red Hat Enterprise Linux ComputeNode (v. 7) curl-7.29.0-51.el7_6.3, libcurl-7.29.0-51.el7_6.3
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) libcurl-devel-7.29.0-51.el7_6.3
    • Red Hat Enterprise Linux Server (v. 7) curl-7.29.0-51.el7_6.3, libcurl-7.29.0-51.el7_6.3, libcurl-7.29.0-51.el7_6.3.ppc +2
    • Red Hat Enterprise Linux Workstation (v. 7) curl-7.29.0-51.el7_6.3, libcurl-7.29.0-51.el7_6.3, libcurl-devel-7.29.0-51.el7_6.3
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) curl-7.29.0-51.el7_6.3, libcurl-7.29.0-51.el7_6.3, libcurl-devel-7.29.0-51.el7_6.3
  • RHSA-2018:3558 Released 2018-11-13 · Red Hat rating Moderate
    httpd24 security, bug fix, and enhancement update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) httpd24-curl-7.61.1-1.el6, httpd24-httpd-2.4.34-7.el6, httpd24-httpd-devel-2.4.34-7.el6 +11
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) httpd24-curl-7.61.1-1.el7, httpd24-httpd-2.4.34-7.el7, httpd24-httpd-devel-2.4.34-7.el7 +12
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4) httpd24-curl-7.61.1-1.el7, httpd24-httpd-2.4.34-7.el7, httpd24-httpd-devel-2.4.34-7.el7 +12
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) httpd24-curl-7.61.1-1.el7, httpd24-httpd-2.4.34-7.el7, httpd24-httpd-devel-2.4.34-7.el7 +12
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) httpd24-curl-7.61.1-1.el7, httpd24-httpd-2.4.34-7.el7, httpd24-httpd-devel-2.4.34-7.el7 +12
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) httpd24-curl-7.61.1-1.el6, httpd24-httpd-2.4.34-7.el6, httpd24-httpd-devel-2.4.34-7.el6 +11
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) httpd24-curl-7.61.1-1.el7, httpd24-httpd-2.4.34-7.el7, httpd24-httpd-devel-2.4.34-7.el7 +12

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 2.0 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
Red Hat Enterprise Linux 5AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Will not fix
Red Hat Ansible Tower 3.4 for RHEL 7 ServerFixed—
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2019:1880
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2019:1880
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2019:1880
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2019:1880
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2019:1880
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2019:1880
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)Fixed RHSA-2019:1880
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4)Fixed RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5)Fixed RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6)Fixed RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2018:3558
Not affected: 3 products
  • Red Hat Enterprise Linux 8
  • Red Hat JBoss Core Services
  • Red Hat JBoss Web Server 3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-14618
  2. 2026-10-03 Alias added: GHSA-4mp9-8964-jxmg

References

Advisory 8

Other 2

Sources

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