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TI-2018-11178 Aliases CVE-2018-15688GHSA-8h24-cwhj-2xgm

Out-of-Bounds write in systemd-networkd dhcpv6 option handling

Priority MEDIUM 43CWE-120Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-120 and the CVSS impact.

Summary

A buffer overflow vulnerability in the dhcp6 client of systemd allows a malicious dhcp6 server to overwrite heap memory in systemd-networkd. Affected releases are systemd: versions up to and including 239.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01666 76th percentileScored 2026-11-07
Fix Fixed Red Hat: 2 advisories

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
systemdsystemdup to 239—No fix listedCNA
  • systemd Vendorsystemd Affected up to 239 Fixed in — No fix listed CNA

CPE configurations NVD · 11

CPEVersionsRoleVendor
cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:*up to 239Vulnerablesystemd
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
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:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
  • cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:* Versions up to 239 Vulnerable ·systemd
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
  • 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:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
Show 1 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat

Remediation

Red Hat 2 advisories

  • RHSA-2019:0049 Released 2019-01-14 · Red Hat rating Important
    systemd security update
    • Red Hat Enterprise Linux Client (v. 7) libgudev1-219-62.el7_6.2, systemd-219-62.el7_6.2, systemd-libs-219-62.el7_6.2 +2
    • Red Hat Enterprise Linux Client Optional (v. 7) libgudev1-devel-219-62.el7_6.2, systemd-devel-219-62.el7_6.2, systemd-journal-gateway-219-62.el7_6.2 +2
    • Red Hat Enterprise Linux ComputeNode (v. 7) libgudev1-219-62.el7_6.2, systemd-219-62.el7_6.2, systemd-libs-219-62.el7_6.2 +2
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) libgudev1-devel-219-62.el7_6.2, systemd-devel-219-62.el7_6.2, systemd-journal-gateway-219-62.el7_6.2 +2
    • Red Hat Enterprise Linux Server (v. 7) libgudev1-219-62.el7_6.2, libgudev1-219-62.el7_6.2.ppc, libgudev1-devel-219-62.el7_6.2 +8
    • Red Hat Enterprise Linux Server Optional (v. 7) systemd-journal-gateway-219-62.el7_6.2, systemd-networkd-219-62.el7_6.2, systemd-resolved-219-62.el7_6.2 +1
    • Red Hat Enterprise Linux Workstation (v. 7) libgudev1-219-62.el7_6.2, libgudev1-devel-219-62.el7_6.2, systemd-219-62.el7_6.2 +4
    • Red Hat Enterprise Linux Workstation Optional (v. 7) systemd-journal-gateway-219-62.el7_6.2, systemd-networkd-219-62.el7_6.2, systemd-resolved-219-62.el7_6.2
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) libgudev1-219-62.el7_6.2, libgudev1-devel-219-62.el7_6.2, systemd-219-62.el7_6.2 +4
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) systemd-journal-gateway-219-62.el7_6.2, systemd-networkd-219-62.el7_6.2, systemd-resolved-219-62.el7_6.2
  • RHSA-2018:3665 Released 2018-11-27 · Red Hat rating Important
    NetworkManager security update
    • Red Hat Enterprise Linux Client (v. 7) NetworkManager-1:1.12.0-8.el7_6, NetworkManager-adsl-1:1.12.0-8.el7_6, NetworkManager-bluetooth-1:1.12.0-8.el7_6 +7
    • Red Hat Enterprise Linux Client Optional (v. 7) NetworkManager-config-server-1:1.12.0-8.el7_6, NetworkManager-dispatcher-routing-rules-1:1.12.0-8.el7_6, NetworkManager-glib-devel-1:1.12.0-8.el7_6 +2
    • Red Hat Enterprise Linux ComputeNode (v. 7) NetworkManager-1:1.12.0-8.el7_6, NetworkManager-adsl-1:1.12.0-8.el7_6, NetworkManager-bluetooth-1:1.12.0-8.el7_6 +7
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) NetworkManager-config-server-1:1.12.0-8.el7_6, NetworkManager-dispatcher-routing-rules-1:1.12.0-8.el7_6, NetworkManager-glib-devel-1:1.12.0-8.el7_6 +2
    • Red Hat Enterprise Linux Server (v. 7) NetworkManager-1:1.12.0-8.el7_6, NetworkManager-adsl-1:1.12.0-8.el7_6, NetworkManager-bluetooth-1:1.12.0-8.el7_6 +10
    • Red Hat Enterprise Linux Server Optional (v. 7) NetworkManager-dispatcher-routing-rules-1:1.12.0-8.el7_6, NetworkManager-glib-devel-1:1.12.0-8.el7_6, NetworkManager-glib-devel-1:1.12.0-8.el7_6.ppc +3
    • Red Hat Enterprise Linux Workstation (v. 7) NetworkManager-1:1.12.0-8.el7_6, NetworkManager-adsl-1:1.12.0-8.el7_6, NetworkManager-bluetooth-1:1.12.0-8.el7_6 +7
    • Red Hat Enterprise Linux Workstation Optional (v. 7) NetworkManager-config-server-1:1.12.0-8.el7_6, NetworkManager-dispatcher-routing-rules-1:1.12.0-8.el7_6, NetworkManager-glib-devel-1:1.12.0-8.el7_6 +2
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) NetworkManager-1:1.12.0-8.el7_6, NetworkManager-adsl-1:1.12.0-8.el7_6, NetworkManager-bluetooth-1:1.12.0-8.el7_6 +8
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) NetworkManager-dispatcher-routing-rules-1:1.12.0-8.el7_6, NetworkManager-glib-devel-1:1.12.0-8.el7_6, NetworkManager-libnm-devel-1:1.12.0-8.el7_6 +1

Fixed in the same release

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

  • Advisory ·

    systemd — GLSA-201810-10

    3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2018-11176 systemd: reexec state injection: fgets() on overlong lines leads to line splittingPriority MEDIUM 40
    • TI-2018-11177 systemd: chown_one() can dereference symlinksPriority LOW 35
    Show all 3 records → Advisory →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2018:3665, RHSA-2019:0049
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2018:3665, RHSA-2019:0049
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2018:3665, RHSA-2019:0049
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2018:3665, RHSA-2019:0049
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2018:3665, RHSA-2019:0049
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2018:3665, RHSA-2019:0049
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2018:3665, RHSA-2019:0049
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2018:3665, RHSA-2019:0049
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)Fixed RHSA-2018:3665, RHSA-2019:0049
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)Fixed RHSA-2018:3665, RHSA-2019:0049
Not affected: 4 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 8
  • Red Hat Virtualization 4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-15688
  2. 2026-10-03 Alias added: GHSA-8h24-cwhj-2xgm

References

Patch 1

Advisory 7

  • TI-2023-11736 systemd before 247 does not adequately block local privilege escalation for some Sudo… CVSS 3.1HIGH 7.8
  • TI-2017-06857 In systemd through 233, certain sizes passed to dns_packet_new in systemd-resolved can… CVSS 3.1HIGH 7.5
  • TI-2026-29031 In nspawn in systemd 233 through 259 before 260, an escape-to-host action can occur via a crafted optional config file. CVSS 3.1MEDIUM 6.4
  • TI-2022-04038 Information disclosure in systemd CVSS 3.1MEDIUM 5.5
  • TI-2025-04111 Systemd-coredump: race condition that allows a local attacker to crash a suid program and… CVSS 3.1MEDIUM 4.7
  • TI-2017-11647 In systemd 223 through 235, a remote DNS server can respond with a custom crafted DNS… CVSS 3.1HIGH 7.5
See all 54 →

Sources

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